Chinese diesel heater error codes: one table for every controller
Updated
There is no single error code list for Chinese diesel heaters. The table below groups every code we could find in a manufacturer or seller manual by controller family. Find your controller first, then read only its section: E-08 is flame-out on the common 5-button LCD, a glow plug fault on the Hcalory HC-A01, and E8 is the blower motor on the Heatport rotary-switch LCD.
Which controller do you have?
The same number means different faults on different controllers. Match yours to a sketch first.
- 5-button LCDE-01 … E-10 with two digits, on a black panel with five round buttons
- Vevor M-button panelE-xx flashing on a colour screen, four keys including M, voice prompts
- Rotary knob, LEDsNo screen: an LED flashes a count, pauses, repeats
- LCD, E-2 … E-10E-2 … E-10, one digit after the dash, no E-1
- Rotary-switch LCD, E0 … E15E1, E2, E3 … with no dash, on an LCD switch you turn and press
- Knob LCD (Hcalory HC-A01)E-01 … E-10 on a colour LCD with one push-turn knob
At a glance: a page for each code
- E-01: undervoltage
- E-02: overvoltage
- E-03: glow plug fault
- E-04: fuel pump fault
- E-05: overheating
- E-06: fan or motor fault
- E-07: controller communication fault
- E-08: flame out
- E-09: sensor fault
- E-10: ignition failure
- F1, F2, F3 sub-codes
- E-11 and E-12 (B2010)
- Rotary knob LED flash codes
- E1, E2, E3 with no dash
- Vevor: fault code menu and app
- Hcalory error codes
Every code we could source, by controller
Every row below is stated in the manufacturer or seller manual linked in its row.
5-button LCD
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| E-01 | OnTrack Outdoor 5 kW | Power supply undervoltage Manual's remedy: Increase supply voltage (charge the battery). Detail page: measure at the battery terminals before and during start-up; check cable size/length for voltage drop; cable must be sized for up to 12 A start-up draw; test battery and charging system. Manual notes a healthy 12 V deep-cycle battery reads 12.4-12.7 V. | Not stated |
| E-01 | D2/D4 parking heater (generic manual) | Undervoltage Manual's remedy: Raise the supply voltage. | Not stated |
| E-01 | Hcalory M98 | Supply voltage fault, 12 V model Manual's remedy: Check the power supply voltage / external power supply. | 12 V model: voltage higher than 18 V or lower than 10 V |
| E-02 | OnTrack Outdoor 5 kW | Power supply overvoltage Manual's remedy: Reduce supply voltage (discharge the battery). Detail page: check voltage at battery before/during start-up; use a charge controller so external sources do not overcharge; discharge or replace battery. | Not stated |
| E-02 | D2/D4 parking heater (generic manual) | Overvoltage Manual's remedy: Reduce the supply voltage. | Not stated |
| E-02 | Hcalory M98 | Supply voltage fault, 24 V model Manual's remedy: Check the power supply voltage / external power supply. | 24 V model: voltage higher than 32 V or lower than 20 V |
| E-03 | OnTrack Outdoor 5 kW | Ignition plug (glow plug) failure Manual's remedy: Check whether the glow plug is open or short-circuited and whether connectors are loose/oxidised; run from a charged battery rather than a battery charger; check air inlet, outlet and exhaust for debris; leave at least 10 cm gap at the air inlet. | Glow plug should read 0.6-0.8 ohm; voltage across the plug should rise slowly to 8-9 V during start-up; battery should not drop below 12 V during start-up |
| E-03 | D2/D4 parking heater (generic manual) | Glow plug fault Manual's remedy: Check whether the glow plug is open-circuit or short-circuit. | Not stated |
| E-03 | Hcalory M98 | Glow plug short circuit / open circuit Manual's remedy: Glow plug short-circuited or connection wire reversed; insulation damage at the tail of the plug; glow plug leakage; poor contact at the connector; plug burned out - replace. | Not stated |
| E-04 | OnTrack Outdoor 5 kW | Fuel pump failure Manual's remedy: Check the fuel pump and its connections for leaks, damage or oxidation. | Not stated |
| E-04 | D2/D4 parking heater (generic manual) | Fuel pump fault Manual's remedy: Check whether the fuel pump is disconnected or short-circuit. | Not stated |
| E-04 | Hcalory M98 | Oil (fuel) pump short circuit / open circuit Manual's remedy: Pump not connected properly or its line short-circuited/disconnected; pin socket on control board not firmly inserted; pump circuit disconnected or pump faulty. | Not stated |
| E-05 | OnTrack Outdoor 5 kW | Over-heat Manual's remedy: Table: check whether the temperature sensor cables are loose or faulty. Detail page (codes 5 and 6 together): check fan spins freely, nothing clogging combustion air supply or exhaust; if the unit turns itself on (fan only) check/replace the temperature sensor. | Fan-to-mainboard distance no more than 5 mm (detail page, codes 5 and 6 treated together) |
| E-05 | D2/D4 parking heater (generic manual) | Heater overheated Manual's remedy: Check the temperature sensor on the shell, or whether fan speed is abnormal. | Not stated |
| E-05 | Hcalory M98 | Shell temperature too high Manual's remedy: Air circulation obstructed (inlet, outlet or duct blocked); installation space too narrow; a pump with a larger fuel delivery connected incorrectly; fuel leaking from the pump one-way valve; sensor damaged. | Shell temperature exceeding 260 C |
| E-06 | OnTrack Outdoor 5 kW | Fan or motor fault (the guide prints "Over-heat" beside a fan symbol; its remedy is about the fan and Hall sensor) Manual's remedy: Check fan magnet polarity, position of the 'Holzer' (Hall) sensor, or a loose terminal. Detail page adds: mainboard may have shifted so its sensor no longer lines up with the fan magnets; remove and reseat the mainboard; run only with the cover on. | Fan-to-mainboard distance no more than 5 mm (detail page) |
| E-06 | D2/D4 parking heater (generic manual) | Motor fault Manual's remedy: Check the polarity of the magnet or the position of the Hall sensor. | Not stated |
| E-06 | Hcalory M98 | Fan short circuit / open circuit / fan magnet too far from the Hall sensor on the main board Manual's remedy: Fan blade stuck; adjust the gap between the fan wheel and the main board; motor failure or replace main board; motor socket not plugged in properly. | Not stated |
| E-07 | OnTrack Outdoor 5 kW | Broken line fault Manual's remedy: Check the LCD connector harness; verify whether the blue wire is loose or short-circuited. | Not stated |
| E-07 | D2/D4 parking heater (generic manual) | Disconnection fault Manual's remedy: Check the connecting plug to the ECU and whether the blue communication line connection is abnormal. | Not stated |
| E-07 | Hcalory M98 | Controller has detected a wiring harness connection failure Manual's remedy: Check wiring and connectors. | Not stated |
| E-08 | OnTrack Outdoor 5 kW | Flame failure Manual's remedy: Check whether the fuel circuit is blocked (poor fuel supply); check tank is clean and has fuel; check fuel filter; try a higher setting (higher pump speed); if all checked and there is smoke, replace the glow plug. | Not stated |
| E-08 | D2/D4 parking heater (generic manual) | Flame-out ('fray-out of flame') Manual's remedy: Check whether the fuel line has air in it or is obstructed. | Not stated |
| E-08 | Hcalory M98 | Extinguished (flame-out) Manual's remedy: Tank short of fuel, pump abnormal or fuel quality problem; fuel circuit leaking or with bubbles so supply is not continuous; intake and exhaust pipes blocked. | Not stated |
| E-09 | OnTrack Outdoor 5 kW | Sensor failure Manual's remedy: Check whether the sensor plug is loose, broken or short-circuited. | Not stated |
| E-09 | D2/D4 parking heater (generic manual) | Sensor fault Manual's remedy: Check whether the temperature sensor is open-circuit or short-circuit. | Not stated |
| E-09 | Hcalory M98 | Case sensor short circuit / open circuit Manual's remedy: Replace the temperature sensor, or the connector is in poor contact. | Not stated |
| E-10 | OnTrack Outdoor 5 kW | Ignition failure Manual's remedy: Check whether the fuel circuit is blocked and fuel quality; check fan moves freely; glow plug cables; clean or replace the filter (screen) at the glow plug; check combustion intake and exhaust are clear; check power connections for oxidation. | Not stated |
| E-10 | D2/D4 parking heater (generic manual) | Ignition failure Manual's remedy: Check for air or obstruction in the fuel line; fuel line blocked or not flowing; poor diesel quality blocking the 'volatile network' (burner screen). | Not stated |
| E-10 | Hcalory M98 | Ignition failure - failed to start after trying twice ('both sides'), failed to form a flame Manual's remedy: Check whether the tank is short of fuel; pump stuck or abnormal; fuel circuit correct and free of bubbles; poor power supply or fuel problem. | Two start attempts |
Vevor M-button panel
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| E-01 | Vevor XMZ-D1 / XMZ-D2 | Abnormal voltage Manual's remedy: Check the heater's supply voltage type matches the vehicle voltage; check supply is not above 18 V or below 9 V; check the main harness connector is not loose. | Supply must not be higher than 18 V or lower than 9 V |
| E-03 | Vevor XMZ-D1 / XMZ-D2 | Ignition plug abnormality Manual's remedy: Check the ignition plug is properly connected; plug faulty - replace; main board faulty - replace. | Not stated |
| E-04 | Vevor XMZ-D1 / XMZ-D2 | Oil (fuel) pump abnormality Manual's remedy: Check the pump plug for loose/false connection; check main wiring harness for disconnection; pump faulty - replace. | Not stated |
| E-05 | Vevor XMZ-D1 / XMZ-D2 | High temperature protection Manual's remedy: Incorrect or faulty furnace temperature sensor type - replace the sensor; main board faulty - replace. | Not stated |
| E-06 | Vevor XMZ-D1 / XMZ-D2 | Fan abnormality Manual's remedy: Check whether the fan impeller is jammed; fan plug loose; fan faulty - replace; fan-wheel induction magnet missing or wrong polarity; main-board wind speed sensor; main board faulty - replace. | Not stated |
| E-08 | Vevor XMZ-D1 / XMZ-D2 | Flame out due to lack of oil (fuel) Manual's remedy: Check the fuel tank for lack of fuel. | Not stated |
| E-09 | Vevor XMZ-D1 / XMZ-D2 | Overheat protection sensor Manual's remedy: Check whether the outlet air temperature sensor connector is loose; outlet sensor faulty - replace the main board; main board faulty - replace. | Not stated |
| E-10 | Vevor XMZ-D1 / XMZ-D2 | Secondary startup failed Manual's remedy: Check whether the fuel pump works; check whether the fuel circuit fittings are waxed up or blocked. | Not stated |
Rotary knob, LEDs
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| 1 flash | Belief rotary controller | Second start failure | Not stated |
| 2 flashes | Vevor CY, LED bar with rotary dial | Supply voltage out of range Manual's remedy: Check whether the battery or generator is normal and whether the fuse is aged. | Normal range: 24 V controller 18-32 V; 12 V controller 9-16 V |
| 2 flashes | Belief rotary controller | Heater has flamed out and tried to restart; core temperature too low Manual's remedy: Check fuel and fuel supply. | Not stated |
| 3 flashes | Vevor CY, LED bar with rotary dial | Ignition plug fault Manual's remedy: Check whether the ignition plug connector is loose or the wire is shorted to the housing; inspect the plug for damage. | Not stated |
| 3 flashes | Belief rotary controller | Voltage too high or too low (normally flat batteries or a poor connection to the battery) | Not stated |
| 4 flashes | Vevor CY, LED bar with rotary dial | Oil (fuel) pump failure Manual's remedy: Check pump wire and connector for damage, looseness, oxidation, short and open circuit. | Not stated |
| 4 flashes | Belief rotary controller | Furnace is too hot to start Manual's remedy: Wait 10 minutes and try again. | Wait 10 minutes |
| 5 flashes | Vevor CY, LED bar with rotary dial | High temperature alarm Manual's remedy: Check the heating duct is clear; check the fan; check the temperature sensor. | Air inlet above 50 C; enclosure above 230 C |
| 5 flashes | Belief rotary controller | Flame or hot air sensor failure Manual's remedy: Get service. | Not stated |
| 6 flashes | Vevor CY, LED bar with rotary dial | Fan fault Manual's remedy: Check whether the impeller is stuck; connector loose; magnet-to-Hall-sensor clearance too large; line short/open; motor leakage. | Not stated |
| 6 flashes | Belief rotary controller | Air sensor failure Manual's remedy: Get service. | Not stated |
| 7 flashes | Belief rotary controller | Fuel pump not connected or fuel pump wires short-circuited Manual's remedy: Check fuel pump wiring. | Not stated |
| 8 flashes | Vevor CY, LED bar with rotary dial | Unsuccessful startup Manual's remedy: 1) Casing too hot and not cooled after 3 minutes of start-up. 2) Lots of white smoke in exhaust: check the filter screen next to the ignition plug (clean/replace), whether the pump sprays fuel forcefully, whether the ignition plug is aged. 3) Little or no white smoke: check for fuel shortage, frozen or blocked fuel circuit, pump stuck/damaged, combustion intake and exhaust clear, ignition plug damaged, inner fan-wheel clearance too large. 4) Ignites normally but still reports ignition failure: check the casing temperature sensor is in full contact with the casing, its pressure spring, and the sensor itself. | Casing not cooled after 3 minutes of start-up (cause 1) |
| 8 flashes | Belief rotary controller | Blower fan broken or jammed | Not stated |
| 9 flashes | Vevor CY, LED bar with rotary dial | Sensor failure Manual's remedy: Check whether the temperature sensor wire/connector is damaged or loose and whether the sensor is damaged. | Not stated |
| 9 flashes | Belief rotary controller | Glow plug broken or short-circuited | Not stated |
| 10 flashes | Belief rotary controller | Heater has overheated during operation or the start process Manual's remedy: Check ducting, vents and heater air flow; let cool and restart. | Not stated |
| 11 flashes | Belief rotary controller | Shell sensor failure Manual's remedy: Get service. | Not stated |
| LED blinking once per second, evenly, no pauses | Dieselheat fault-finding guide | Rotary controller equivalent of E10: failed to start and locked out Manual's remedy: Reset by removing the fuse, then follow the no-start checks (power, fuel, air and exhaust). | Not stated |
| LED flashes 1-8 times with a pause between groups | Dieselheat fault-finding guide | Rotary controller error code (the guide says 1 to 8 flashes and refers to a code list 'at the back of this guide' that is not in the 6-page PDF) Manual's remedy: Try to clear by removing the fuse near the battery, refitting it and restarting. | Not stated |
| slow continuous flash | Belief rotary controller | Heater could not ignite after 2 start attempts (about 6 minutes) - locked out Manual's remedy: Remove the fuse to reset, refit and turn on again; after running out of fuel repeat up to 6 times to re-prime. | 2 start attempts over about 6 minutes |
LCD, E-2 … E-10
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| E-2 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Power supply voltage out of range Manual's remedy: Check the battery or generator is working properly; check whether the fuse is aged. | Normal range: 24 V controller 18-32 V; 12 V controller 9-16 V |
| E-2 | Gasmate DH203 | Over-voltage or under-voltage Manual's remedy: Check battery charge level and condition; fuse condition and connection; cable condition and excessive voltage drop. | Supply voltage detected outside 9-16 V |
| E-2 | Liwolf all-in-one | Power supply voltage range Manual's remedy: Check voltage range; inspect battery or generator; check whether the fuse is broken. | 24 V: 18-32 V; 12 V: 9-16 V |
| E-3 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Ignition plug malfunction Manual's remedy: Check whether the ignition plug connector is loose or the wire is shorted to the casing; check whether the plug is damaged. | Not stated |
| E-3 | Gasmate DH203 | Glow plug failure Manual's remedy: Contact service support for inspection or replacement of the glow plug. | Not stated |
| E-3 | Liwolf all-in-one | Ignition plug failure Manual's remedy: Check for loose ignition plug connectors or wire shorted to the housing; check whether the plug is damaged. | Not stated |
| E-4 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Oil (fuel) pump malfunction Manual's remedy: Check pump connection wires and connectors for damage, looseness, oxidation, short or open circuit. | Not stated |
| E-4 | Gasmate DH203 | Fuel pump failure Manual's remedy: Contact service support for inspection or replacement of the fuel pump. | Not stated |
| E-4 | Liwolf all-in-one | Fuel pump failure Manual's remedy: Inspect pump harness and connectors for damage, looseness, oxidation, short or open circuits. | Not stated |
| E-5 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | High temperature alarm Manual's remedy: Check the heating air duct is unobstructed; check the fan runs normally; check the temperature sensor. | Inlet air above 50 C; casing above 230 C |
| E-5 | Gasmate DH203 | Overheating Manual's remedy: Let the heater cool; check intake and hot-air ducts for blockage, crushing or restriction; otherwise service the fan or temperature sensor. | Inlet air above 50 C or internal heat exchanger above 230 C |
| E-5 | Liwolf all-in-one | High-temperature alarm Manual's remedy: Check the heating airflow path is clear; fan operating correctly; temperature sensor functioning. | Inlet above 50 C; housing above 230 C |
| E-6 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Fan failure Manual's remedy: Check whether the impeller is stuck; connector loose; gap between the fan magnet and the Hall sensor on the controller too large; circuit short/open; motor leakage. | Not stated |
| E-6 | Gasmate DH203 | Fan failure Manual's remedy: With heater off and power disconnected, check the impeller rotates freely and remove anything blocking it; otherwise service. | Not stated |
| E-6 | Liwolf all-in-one | Fan failure Manual's remedy: Check whether the impeller is jammed; loose connection plugs; proper gap between fan-wheel magnet and controller Hall sensor; harness short/open circuit; motor leakage. | Not stated |
| E-7 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Communication failure Manual's remedy: Check the wiring harnesses. | Not stated |
| E-8 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Flame-out (printed 'Turn off the engine') Manual's remedy: Check for fuel shortage, fuel gelled by cold, blocked fuel circuit, stuck pump; check combustion air intake and exhaust are unobstructed; check the casing temperature sensor is in full contact with the casing and its spring is strong. | Not stated |
| E-8 | Gasmate DH203 | Fail to start (first of two causes listed under E-8) Manual's remedy: Check power source capacity (will not start from a regular car cigarette socket or an outlet under 15 A); fuel level; fuel condition (drain old fuel); winter/alpine diesel at low temperature; combustion intake and exhaust openings; otherwise service. | Power source must supply at least 15 A |
| E-8 | Gasmate DH203 | Flameout (second cause listed under E-8) Manual's remedy: If recently used the heat exchanger may be too hot - let it cool fully and retry; lots of white smoke on start: service glow plug, screen and fuel pump; little or no white smoke: check intake/exhaust openings, fuel level, fuel condition, winter diesel; temperature sensor service. | Not stated |
| E-08 | Liwolf all-in-one | Stall (flame-out); printed as E-08 in a table that otherwise uses E-2 to E-9 Manual's remedy: Check for low fuel, fuel gelled by cold, fuel pipe blockage or pump jamming; intake and exhaust airflow paths clear; housing temperature sensor in good contact with the housing. | Not stated |
| E-8 | Liwolf all-in-one | Start failure; printed as E-8 (the same table also has the E-08 stall row) Manual's remedy: 1) Housing too hot and cooling fails: wait until cooled and power on again. 2) Excess white smoke: check filter next to the ignition plug, pump injection, ignition plug. 3) Little or no white smoke: fuel shortage, frozen/blocked fuel pipe, pump stuck, intake/exhaust blockage, ignition plug, internal fan-wheel gap. 4) Ignition normal but fault persists: housing temperature sensor contact. | Not stated |
| E-9 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Sensor fault Manual's remedy: Check whether the temperature sensor wire/connector is damaged or loose and whether the sensor is damaged. | Not stated |
| E-9 | Gasmate DH203 | Temperature sensor failure Manual's remedy: Contact service support for inspection or replacement of the temperature sensor. | Not stated |
| E-9 | Liwolf all-in-one | Sensor failure Manual's remedy: Check whether the temperature sensor harness and connectors are damaged or loose. | Not stated |
| E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels | Unsuccessful startup Manual's remedy: 1) Casing too hot and not cooled after 3 minutes of start-up. 2) Lots of white smoke in exhaust: check the filter screen next to the ignition plug (clean/replace), whether the pump sprays fuel forcefully, whether the ignition plug is aged. 3) Little or no white smoke: check for fuel shortage, frozen or blocked fuel circuit, pump stuck/damaged, combustion intake and exhaust clear, ignition plug damaged, inner fan-wheel clearance too large. 4) Ignites normally but still reports ignition failure: check the casing temperature sensor is in full contact with the casing, its pressure spring, and the sensor itself. | Casing not cooled after 3 minutes of start-up (cause 1) |
Rotary-switch LCD, E0 … E15
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| C2/C7 | T4 two-knob LCD switch | Control switch Manual's remedy: Verify the control switch is properly connected to its wiring; replace the control switch if necessary. | Not stated |
| C4 | T4 two-knob LCD switch | Control switch Manual's remedy: Replace the control switch. | Not stated |
| E0 | Heatport H2 / H4 (EnControl) | Control unit: fault of the ECU, or incorrect ECU / wired controller Manual's remedy: Replace ECU / wired controller. | Not stated |
| E0 | T4 two-knob LCD switch | Control unit error Manual's remedy: Replace the control circuit board. | Not stated |
| E1 | Heatport H2 / H4 (EnControl) | Failed ignition Manual's remedy: No fuel entering the heater (tank empty or level below the suction pipe): fill and use fuel pumping mode or repeat start-up until bubbles are gone; wrong placement of fuel lines/filter/pump (airlock on intake side); wrong fuel line diameter; blocked or compressed air intake/exhaust; water in intake/exhaust pipe; blocked fuel line or filter; bad fuel; carbon in burner (replace burner); carbon in heat exchanger/exhaust/silencer (pressure clean with water); dirty atomising net or glow plug (replace); faulty gaskets; fuel pump; ECU. | Not stated |
| E1 | T4 two-knob LCD switch | Failed to start (tried twice) / failed to form a flame Manual's remedy: Check for fuel exhaustion; remove bubbles in the fuel line and check supply; replace the pump if it fails to pump; clear blockages in air inlet or exhaust outlet; if white/black smoke, unplug the fuel inlet pipe, let the heater dry-run and restart. | Two start attempts |
| E2 | Heatport H2 / H4 (EnControl) | Flame extinction Manual's remedy: Same checks as E1. | Not stated |
| E2 | T4 two-knob LCD switch | Flame off (repeated 3 times) Manual's remedy: Remove bubbles from the fuel line; replace the pump if output is insufficient; check and clean air intake and exhaust of carbon deposits. | Flame-out repeated 3 times |
| E3 | Heatport H2 / H4 (EnControl) | Undervoltage or overvoltage Manual's remedy: Verify battery voltage at the harness terminals (or at the ECU connector if the harness was extended); if below 12.6 V (flooded) / 12.8 V (AGM) charge the batteries first; overvoltage causes: charger in boost mode, alternator overcharging, solar controller overcharging; check ECU connector for dirt/corrosion; inspect harness; ECU. | Minimum 10.5 V (22.5 V for 24 V unit); maximum 15 V for 12 V version and 30 V for 24 V version |
| E3 | T4 two-knob LCD switch | Undervoltage or overvoltage Manual's remedy: Verify voltage matches the heater's requirements; check power cord installation and that no non-compliant cords are used; confirm the power converter gives adequate current and stable output. | Not stated |
| E4 | Heatport H2 / H4 (EnControl) | Premature ignition identification Manual's remedy: Residual fuel in the heater (shutdown not completed, e.g. voltage drop): leave the heater in a warm, well-vented place to evaporate the fuel. | Not stated |
| E4 | T4 two-knob LCD switch | Premature ignition Manual's remedy: Restart the heater after verifying that the last improper shutdown left residual fuel causing premature ignition. | Not stated |
| E5 | Heatport H2 / H4 (EnControl) | Thermal efficiency failure Manual's remedy: Bad fuel - replace; fuel filter blocked - clean/replace; fuel inlet blocked - clean inlet and tank; carbon in burner - replace burner; temperature sensor fault - replace the Pt1000 sensor; fuel pump fault - replace. | Not stated |
| E6 | Heatport H2 / H4 (EnControl) | Temperature sensor (on the controller) damaged Manual's remedy: Replace the controller. | Not stated |
| E6 | T4 two-knob LCD switch | Open/short circuit of temperature sensor Manual's remedy: Verify sufficient installation space to avoid overheating; replace the temperature sensor or the circuit board if damaged. | Not stated |
| E7 | Heatport H2 / H4 (EnControl) | Fuel pump Manual's remedy: Check fuel pump / ECU connectors for dirt or corrosion; wiring harness; fuel pump; ECU. | Not stated |
| E7 | T4 two-knob LCD switch | Open/short circuit of fuel pump Manual's remedy: Verify contact between harness and pump socket; replace the pump if necessary; replace the control board (rare). | Not stated |
| E8 | Heatport H2 / H4 (EnControl) | Blower motor Manual's remedy: Check heating air intake for obstructions and that the blower turns freely; impeller damage (obstruction, over-torqued ducting clamp, debris under the heater) - replace blower; short circuit - check resistance and wiring; loose ECU casing / mispositioned magnetic sensor - fix ECU position; ECU. | Speed failure: motor speed off specification by more than 10% for longer than 30 seconds |
| E8 | T4 two-knob LCD switch | Motor Manual's remedy: Fix/reinstall the fan blade if stuck; replace the motor if defective; check the Hall sensor or circuit board; ensure motor wires are connected to the board socket. | Not stated |
| E9 | Heatport H2 / H4 (EnControl) | Glow plug (short circuit of wiring / faulty plug) Manual's remedy: Replace the glow plug; ECU. | Not stated |
| E9 | T4 two-knob LCD switch | Glow plug failure Manual's remedy: Replace the glow plug; check for unstable voltage (power connections, fuse, battery voltage); replace the circuit board (rare); check glow plug wire connection to the board. | Not stated |
| E10 | Heatport H2 / H4 (EnControl) | Overheat: excess temperature measured at the overheat sensor Manual's remedy: Check fan not blocked/damaged; check ducting free from obstruction; remove the PT1000 sensor, check connections/wiring and reinstall; replace sensor if wiring damaged; ECU. | Not stated |
| E10 | T4 two-knob LCD switch | Overheat Manual's remedy: Verify the air duct is not blocked; address temperature sensor failure or loose contact with the aluminium heat exchanger ('radiator'). | Not stated |
| E11 | Heatport H2 / H4 (EnControl) | PT1000 temperature sensor connection malfunction / damaged / shorted Manual's remedy: Check PT1000 connection to ECU; replace the sensor; ECU. | Not stated |
| E11 | T4 two-knob LCD switch | Open/short circuit of temperature sensor Manual's remedy: Replace the temperature sensor if damaged; ensure wires are properly connected to the sensor and circuit board ports. | Not stated |
| E12 | Heatport H2 / H4 (EnControl) | Glow plug disconnected Manual's remedy: Connect the glow plug to the ECU; glow plug; ECU. | Not stated |
| E12 | T4 two-knob LCD switch | Open circuit of glow plug Manual's remedy: Check power connections, fuse and battery voltage; replace the circuit board if necessary. | Not stated |
| E14 | Heatport H2 / H4 (EnControl) | PT1000 temperature sensor not positioned correctly Manual's remedy: Install the PT1000 temperature sensor correctly. | Not stated |
| E14 | T4 two-knob LCD switch | Incorrect location of temperature sensor Manual's remedy: Install the temperature sensor properly. | Not stated |
| E15 | T4 two-knob LCD switch | Open circuit of 'Setvalue Generator' Manual's remedy: Replace the control circuit board. | Not stated |
Knob LCD (Hcalory HC-A01)
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| E-01 | Hcalory HC-A01 | Start-up failure Manual's remedy: Check whether the fuel pump is working; check whether the fuel circuit fittings are waxed up or blocked. | Not stated |
| E-02 | Hcalory HC-A01 | Lack of oil (fuel) and stalling Manual's remedy: Check the fuel tank for lack of fuel. | Not stated |
| E-03 | Hcalory HC-A01 | Abnormal voltage Manual's remedy: Check the heater's supply voltage type matches the vehicle; check the voltage limits; check the main harness connector is not loose. | 24 V version: not higher than 32 V or lower than 18 V; 12 V version: not higher than 18 V or lower than 9 V |
| E-04 | Hcalory HC-A01 | Air outlet temperature sensor failure Manual's remedy: Check whether the outlet air temperature sensor connector is loose; outlet sensor failed - replace the main board; main board failure - replace. | Not stated |
| E-05 | Hcalory HC-A01 | Inlet air temperature sensor failure Manual's remedy: Inlet air sensor failure - replace the main board. | Not stated |
| E-06 | Hcalory HC-A01 | Oil (fuel) pump abnormality Manual's remedy: Check the pump plug for loose connection; check the main wiring harness for disconnection; pump failure - replace. | Not stated |
| E-07 | Hcalory HC-A01 | Fan abnormality Manual's remedy: Check whether the fan impeller is jammed; fan plug loose; fan failure - replace; fan-wheel induction magnet missing or wrong polarity; main-board wind speed sensor; main board failure - replace. | Not stated |
| E-08 | Hcalory HC-A01 | Ignition plug abnormality Manual's remedy: Check the ignition plug connection; faulty plug - replace; main board failure - replace. | Not stated |
| E-09 | Hcalory HC-A01 | High temperature protection Manual's remedy: Incorrect or faulty furnace temperature sensor type - replace the sensor; main board failure - replace. | Not stated |
| E-10 | Hcalory HC-A01 | Furnace temperature sensor abnormal Manual's remedy: Check the furnace temperature sensor connector for a loose connection; incorrect or faulty sensor type - replace; main board failure - replace. | Not stated |
B2010 (spanner button)
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| E-01 | B2010 controller | Under voltage | 12 V system: lower than 10 V; 24 V system: lower than 18 V |
| E-02 | B2010 controller | Over voltage | 12 V system: higher than 17 V; 24 V system: higher than 32 V |
| E-03 F1 | B2010 controller | Glow plug ('spark plug') short circuit | Not stated |
| E-03 F2 | B2010 controller | Glow plug ('spark plug') open circuit | Not stated |
| E-03 F3 | B2010 controller | Glow plug ('spark plug') abnormality | Not stated |
| E-04 F1 | B2010 controller | Fuel ('oil') pump short circuit | Not stated |
| E-04 F2 | B2010 controller | Fuel ('oil') pump open circuit | Not stated |
| E-05 | B2010 controller | Overheating Manual's remedy: Check whether the air inlet and outlet are blocked. | Shell temperature exceeds 260 C |
| E-06 F1 | B2010 controller | Fan motor short circuit | Not stated |
| E-06 F2 | B2010 controller | Fan motor open circuit | Not stated |
| E-06 F3 | B2010 controller | Fan speed not recognised by Hall sensor | Not stated |
| E-07 | B2010 controller | Disconnection Manual's remedy: Check whether the communication cable or plug between the power button (control panel) and the controller is open or poorly ('virtually') connected. | Not stated |
| E-08 | B2010 controller | Flame failure Manual's remedy: Check for air or wax blockage in the fuel circuit causing poor fuel supply. | Not stated |
| E-09 F1 | B2010 controller | Case temperature sensor short circuit | Not stated |
| E-09 F2 | B2010 controller | Case temperature sensor open circuit | Not stated |
| E-10 | B2010 controller | Ignition failure (after two failed ignition attempts) Manual's remedy: Check for blocked fuel circuit, poor fuel intake, stuck fuel pump, or blocked 'volatile net' (burner screen) due to fuel problems. | Two failed ignitions |
| E-11 | B2010 controller | Ambient temperature sensor open or short-circuited | Not stated |
| E-12 | B2010 controller | Controller overheating Manual's remedy: Check whether the air inlet and outlet are blocked, or whether the ECU is damaged. | Controller temperature exceeds 100 C |
Vevor CY knob LCD
| Code | Manual or brand | Meaning | Stated limit |
|---|---|---|---|
| 1 | Vevor CY, single-knob LCD | Power supply voltage out of range Manual's remedy: Check the battery or generator; check whether the fuse is aged. | Normal range: 24 V controller 18-32 V; 12 V controller 9-16 V |
| 2 | Vevor CY, knob LCD with pump and plateau keys | Power supply voltage out of range Manual's remedy: Check whether the battery or generator is normal. | Normal range: 24 V controller 18-32 V; 12 V controller 9-16 V |
| 2 | Vevor CY, single-knob LCD | Oil (fuel) pump failure Manual's remedy: Check pump wire and connector for damage, looseness, oxidation, short or open circuit. | Not stated |
| 3 | Vevor CY, knob LCD with pump and plateau keys | Oil (fuel) pump failure Manual's remedy: Check pump connections and connectors for damage or looseness. | Not stated |
| 3 | Vevor CY, single-knob LCD | Ignition plug malfunction Manual's remedy: Check whether the plug is damaged and whether its connector is loose/oxidised or the wire is short/open. | Not stated |
| 4 | Vevor CY, knob LCD with pump and plateau keys | Ignition plug failure Manual's remedy: Check whether the ignition plug connector is loose. | Not stated |
| 4 | Vevor CY, single-knob LCD | Fan failure Manual's remedy: Check whether the impeller is stuck; connector loose or oxidised; magnet-to-Hall-sensor gap too large or magnet installed reversed; short/open circuit or motor coil leakage. | Not stated |
| 5 | Vevor CY, knob LCD with pump and plateau keys | Fan failure Manual's remedy: Check whether the impeller is stuck; check whether the connector is loose. | Not stated |
| 5 | Vevor CY, single-knob LCD | High temperature alarm Manual's remedy: Check the heating duct is clear; fan operates normally; temperature sensor normal. | Air inlet above 50 C; enclosure above 230 C |
| 6 | Vevor CY, knob LCD with pump and plateau keys | Sensor failure Manual's remedy: Check whether temperature sensor wires/connectors are damaged or loose and whether the sensor is damaged. | Not stated |
| 6 | Vevor CY, single-knob LCD | Flameout alarm Manual's remedy: Check for fuel shortage, frozen fuel circuit or stuck pump; check combustion intake and exhaust ducts; check the casing temperature sensor is in full contact with the casing. | Not stated |
| 7 | Vevor CY, knob LCD with pump and plateau keys | Unsuccessful startup Manual's remedy: 1) Shell temperature too high. 2) Lots of white smoke: check fan, filter beside the ignition plug, combustion intake/exhaust passages, ignition plug ageing. 3) Little or no white smoke: check fuel shortage, frozen fuel line, blocked pump, damaged ignition plug, loose housing temperature sensor. | Shell too hot to be cooled within 3 minutes after starting (cause 1) |
| 7 | Vevor CY, single-knob LCD | Unsuccessful startup Manual's remedy: 1) Casing too hot and not cooled after 3 minutes of start-up. 2) Lots of white smoke in exhaust: check the filter screen next to the ignition plug (clean/replace), whether the pump sprays fuel forcefully, whether the ignition plug is aged. 3) Little or no white smoke: check for fuel shortage, frozen or blocked fuel circuit, pump stuck/damaged, combustion intake and exhaust clear, ignition plug damaged, inner fan-wheel clearance too large. 4) Ignites normally but still reports ignition failure: check the casing temperature sensor is in full contact with the casing, its pressure spring, and the sensor itself. | Casing cannot be cooled after 3 minutes of start-up (cause 1) |
| 8 | Vevor CY, knob LCD with pump and plateau keys | High temperature alarm Manual's remedy: Check the heating duct is unobstructed; check the fan works properly. | Intake above 50 C; casing above 200 C |
| 8 | Vevor CY, single-knob LCD | Sensor failure Manual's remedy: Check whether the temperature sensor wire/connector is damaged or loose and whether the sensor is damaged. | Not stated |
| 9 | Vevor CY, knob LCD with pump and plateau keys | Flameout alarm Manual's remedy: Check for fuel shortage, frozen fuel line, jammed pump; check the fan works properly. | Not stated |
How to read this table
- Each row links to the manual it was taken from. "Stated limit" is filled in only where that manual prints a number.
- Where two manuals for the same controller differ, both rows are shown. They are not merged into one answer.
- On the common 5-button LCD, the B2010 and the Vevor M-button panel, the numbers mean broadly the same thing. On every other family they do not.
- Voltage limits differ by manual: 9 to 18 V (Vevor XMZ), 9 to 16 V (Vevor CY, Gasmate, Liwolf), 10 to 17 V (B2010) and 10.5 to 15 V (Heatport), all for 12 V heaters.
- Genuine Planar, Autoterm, Webasto and Eberspächer heaters use their own code tables and are not covered here.
Related questions
- Which table do I use if my screen shows E-08?
- Two digits after a dash point to the common 5-button LCD, the B2010, the Vevor M-button panel or the Hcalory knob LCD. The first three agree that E-08 is flame-out. On the Hcalory HC-A01 knob LCD, E-08 is a glow plug fault. Check which panel you have on the controller guide.
- What does E-10 mean on a Chinese diesel heater?
- On the common 5-button LCD, the B2010 and the Vevor M-button panel it means the heater failed to light, in most manuals after two attempts. On the Hcalory HC-A01 knob LCD, E-10 is a furnace temperature sensor fault, and on the rotary-switch LCD on Heatport and T4 heaters E10 is overheating.
- Is there an E-11 or E-12?
- Only on some controllers. The B2010 manual lists E-11 (ambient temperature sensor) and E-12 (controller overheating). The rotary-switch LCD on Heatport and T4 heaters goes up to E15 with different meanings.
Sources
Everything on this page is compiled from the documents and discussions below. We summarise them in our own words; follow the links for the originals.
- OnTrack Outdoor: diesel heater troubleshooting guide (PDF) (cdn.shopify.com)
- D2/D4 parking heater 12 V/24 V user manual, Alza import (PDF) (dwn.alza.cz)
- B2010 controller operating manual V1.2 (PDF) (cdn.shopify.com)
- Vevor diesel heater manual, XMZ-D1 / XMZ-D2 (PDF copy) (tuitam.pl)
- Vevor diesel heater manual, CY-5001 / CY-5002 / CY-5004 (PDF copy) (xlrzbfnheqpszgtyhdkh.supabase.co)
- Gasmate portable diesel heater manual, DH203 (PDF) (snowys.com.au)
- Liwolf parking heater all-in-one manual V1.0 (PDF) (cdn.shopify.com)
- Hcalory air heater user manual, M98 (PDF) (cdn.shopify.com)
- Hcalory HC-A01 toolbox heater user manual (archived transcription) (web.archive.org)
- Heatport H2 / H4 EnControl user manual v1.00 (PDF) (cdn.shopify.com)
- T4 diesel air heater user manual, Alza import (PDF) (dwn.alza.cz)
- Belief diesel air heater user guide, rotary control (PDF) (dieselheat.com.au)
- Dieselheat: diesel air heater fault finding guide (PDF) (dieselheat.com.au)