Diesel heater LCD showing E-2 to E-10: what it means
Updated
These panels number their faults from E-2. The meanings line up with the common table from E-3 upward (glow plug, pump, overheating, fan), but E-2 covers both over- and under-voltage, and the manuals disagree about E-8: Gasmate lists both failure to start and flame-out under it, and Liwolf prints separate E-08 and E-8 rows. The Vevor CY and Liwolf versions set heat in gears H1 to H6 and have a plateau (high-altitude) mode.
Is this your controller?
Also called: Vevor CY LCD switch, Gasmate controller, Liwolf controller
An LCD panel whose fault codes have a dash but no zero: E-2, E-3 and so on. Vevor's CY manual shows two such panels, one with five keys (up, on/off, down, set, OK) and an infrared receiver, and one with three keys (left, right, power). On the five-key panel manual mode is shown as six gears, H1 to H6. Liwolf's five-button panel also uses H1 to H6, and Gasmate's DH203 prints the same style of fault table.
How it shows a fault: E-2 to E-10 on the screen. There is no E-1: voltage faults, high or low, are E-2.
Reported on: Vevor CY-5001 / CY-5002 / CY-5004, Gasmate DH203, Liwolf all-in-one.
Not a match? See the other controller families.
At a glance
| Fault display | E-2 … E-10, one digit after the dash, no E-1 |
|---|---|
| Codes documented | E-2, E-3, E-4, E-5, E-6, E-7, E-8, E-9, E-10, E-08 |
| Settings menu | No tuning menu documented; plateau mode and unit switching are key combinations |
| Remote pairing | Not documented in our sources |
Error codes on this controller
| Code | Controller | Manual or brand | Meaning | Stated limit |
|---|---|---|---|---|
| E-2 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | 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 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | Glow plug failure Manual's remedy: Contact service support for inspection or replacement of the glow plug. | Not stated |
| E-3 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | Fuel pump failure Manual's remedy: Contact service support for inspection or replacement of the fuel pump. | Not stated |
| E-4 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | Fuel pump failure Manual's remedy: Inspect pump harness and connectors for damage, looseness, oxidation, short or open circuits. | Not stated |
| E-5 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | 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 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | 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 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | Communication failure Manual's remedy: Check the wiring harnesses. | Not stated |
| E-8 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | 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 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | 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 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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 | LCD, E-2 … E-10 | Gasmate DH203 Manual | Temperature sensor failure Manual's remedy: Contact service support for inspection or replacement of the temperature sensor. | Not stated |
| E-9 | LCD, E-2 … E-10 | Liwolf all-in-one Manual | Sensor failure Manual's remedy: Check whether the temperature sensor harness and connectors are damaged or loose. | Not stated |
| E-10 | LCD, E-2 … E-10 | Vevor CY-5001/5002/5004, 5-key and 3-key LCD panels Manual | 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) |
Procedures on this controller
Plateau (high-altitude) mode Manual
Vevor CY five-key panel: hold set and up together for 2 s to enter (an icon shows), and hold set and OK for 2 s to leave. Liwolf: hold settings and OK for 2 s to enter, and the same again to leave. Neither manual gives an altitude figure.
Switch manual gears and automatic temperature mode (Vevor CY five-key panel) Manual
Hold the set key for 2 s. Manual mode has six gears, H1 to H6; automatic mode runs from 5 to 30 °C.
Switch Fahrenheit and Celsius (Vevor CY five-key panel) Manual
Hold power and up together for 2 s.
Known quirks
- These manuals give the normal supply range as 9 to 16 V for 12 V heaters and 18 to 32 V for 24 V heaters.
- Gasmate's manual says the power source must be able to supply at least 15 A to start the heater.
- The overheating row gives limits: inlet air above 50 °C or casing above 230 °C.
Pages that apply to this controller
- Reset a locked-out heater
- White smoke and no start
- Shuts down or low power
- Controller screen is blank
- Altitude tuning
- Hidden settings menu
- Soot build-up and the clean burn
- Manual fuel priming
- Pairing the remote
- Lithium, power stations and voltage errors
- Cleaning the glow plug and its screen
- All error codes in one table
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.
- 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)