E-06 on a diesel heater: fan or motor fault
Updated
E-06 means the controller cannot run the fan or cannot read its speed. The fan is jammed or rubbing, the motor or its plug has failed, or the fan's magnet no longer lines up with the Hall sensor on the main board. First check: with the power off, see that the fan turns freely and nothing touches it.
Which controller do you have?
The same number means different faults on different controllers. Match yours to a sketch first. This meaning applies to the 5-button LCD, the B2010 and the Vevor M-button panel; on the Hcalory HC-A01 knob LCD, E-06 is a fuel pump fault.
- 5-button LCDE-01 … E-10 with two digits, on a black panel with five round buttonsThis page applies
- Vevor M-button panelE-xx flashing on a colour screen, four keys including M, voice promptsThis page applies
- 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
| Code | E-06 |
|---|---|
| Meaning | Fan or fan motor fault, or fan speed not detected |
| Most common cause | Fan rubbing or jammed, failed motor, or fan magnet out of line with the Hall sensor |
| Check this first | Power off, then check that the fan turns freely and its plug is seated |
| Evidence | Manuals and owner reports |
What E-06 means on each controller
| Code | Controller | Manual or brand | Meaning | Stated limit |
|---|---|---|---|---|
| E-06 | 5-button LCD | OnTrack Outdoor 5 kW Manual | 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 | 5-button LCD | D2/D4 parking heater (generic manual) Manual | Motor fault Manual's remedy: Check the polarity of the magnet or the position of the Hall sensor. | Not stated |
| E-06 | 5-button LCD | Hcalory M98 Manual | 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-06 | Vevor M-button panel | Vevor XMZ-D1 / XMZ-D2 Manual | 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-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 |
| E6 | Rotary-switch LCD, E0 … E15 | Heatport H2 / H4 (EnControl) Manual | Temperature sensor (on the controller) damaged Manual's remedy: Replace the controller. | Not stated |
| E6 | Rotary-switch LCD, E0 … E15 | T4 two-knob LCD switch Manual | 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 |
| E-06 | Knob LCD (Hcalory HC-A01) | Hcalory HC-A01 Manual | 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-06 F1 | B2010 (spanner button) | B2010 controller Manual | Fan motor short circuit | Not stated |
| E-06 F2 | B2010 (spanner button) | B2010 controller Manual | Fan motor open circuit | Not stated |
| E-06 F3 | B2010 (spanner button) | B2010 controller Manual | Fan speed not recognised by Hall sensor | Not stated |
What does E-06 mean?
The main board reads the fan’s speed from a magnet on the fan wheel that passes a Hall sensor on the board. E-06 says the fan motor is not running as it should, or its speed is not being read. Manual
The manuals agree on the fault but word it differently:
| Manual | What it lists under E-06 |
|---|---|
| OnTrack guide | Prints “Over-heat” with a fan symbol. Remedy: fan magnet polarity, Hall sensor position, loose terminal |
| Generic D2/D4 manual | Motor fault: magnet polarity or Hall sensor position |
| B2010 | F1 motor short circuit, F2 motor open circuit, F3 fan speed not recognised by the Hall sensor |
| Vevor XMZ-D1 / XMZ-D2 | Fan abnormality: impeller jammed, plug loose, fan faulty, magnet missing or reversed, speed sensor or main board |
| Hcalory M98 | Fan short or open circuit, or magnet too far from the Hall sensor: blade stuck, gap, motor, main board, socket not plugged in |
All rows are from the manuals. Manual
The OnTrack wording is a quirk of that guide: it prints “Over-heat” for E-05 as well. For real overheating see E-05.
What do owners find behind E-06?
- The fan fouling on something. Two owners: one heater was faulty from new because the plastic ECU cover was clipped on slightly too far forward and touched the fan; the other was boarded in very tightly. Owners
- A dead or worn fan motor. Three owners: one new heater stopped after two days with the fan power wires open circuit; one had a squealing fan, smoke, then E-06, and a new blower fixed it; one had F2 E-06 from brush dust packed inside the motor, after he had disturbed the fan wheel. Owners
- Fan magnet and Hall sensor out of line. Two owners in one thread cleared E-6 by turning the fan by hand, the first after opening a heater that had sat unused for a week. Neither proved the cause, and the second expected it to come back. A third, in another thread, got an instant E06 on a replacement board and found the Hall sensor slightly out of line with the fan magnets; that board proved faulty anyway. Owners
- Plugs swapped after a strip-down. Two owners in two threads had E-06 or E-09 straight after reassembly because the identical temperature-sensor and fan-motor plugs were swapped on the board. Owners
Taken together, five owners in five threads confirmed a fan that was physically obstructed or a motor that had failed. The other causes have fewer reports.
How do I check the fan?
Power off and heater cold before you touch anything.
- Did you just have it apart? If E-06 or E-09 appeared straight after reassembly, look at the two identical plugs on the main board first, and check that the cover sits where it did. Owners The OnTrack guide says to run the heater only with its cover on. Manual If nothing was disturbed, go to step 2.
- Turn the fan by hand. Look into the cabin air inlet for anything lodged against the fan, and feel for rubbing or a stiff spot. Manual Rubbing: find what touches it (cover, casing, tight panelling). Free: go to step 3.
- Check the fan plug. The Vevor and Hcalory manuals both list a fan plug that is loose or not pushed in. Manual Reseat it. Still E-06: go to step 4.
- Read the sub-code on a B2010. F1 or F2 points at the motor or its wiring. F3 points at the speed signal: go to step 5. Manual More on the F1, F2 and F3 page.
- Check the magnet and Hall sensor. The OnTrack guide says the distance between the fan and the main board should be no more than 5 mm, and that a main board which has shifted no longer lines its sensor up with the fan magnets: its remedy is to remove and reseat the board. Manual The manuals also list a missing or reversed magnet.
- Rule out the supply if the code is intermittent at start-up. One owner on a 10 A power-station socket got intermittent codes in an E-6 thread. Owners See E-01.
How do I clear E-06?
The manuals give no reset step for E-06. Once the fan runs and is detected, start again. If the heater stays locked, see how to reset a locked-out heater.
When should I stop?
Stop when the fan is free, its plug is seated, the board sits correctly and E-06 remains. The parts left are the fan motor and the main board. The Vevor and Hcalory manuals both end with replacing the fan or the main board. Manual On a new heater, claim it from the seller: one owner with an open-circuit fan was sent a complete replacement heater. Owners
If you are not sure, ask a technician. Replacing the fan motor or the control board goes beyond routine owner maintenance. A mistake here can cause a fuel or exhaust leak. Stop if anything is unclear.
Is E-06 the same on other controllers?
No. The panels in the Vevor CY manual that show E-6 with no leading zero also use it for fan failure. On the Hcalory HC-A01 knob LCD, E-06 is a fuel pump fault and the fan fault is E-07. Manual Check which controller you have.
Related questions
- Why do I get E-06 when the fan spins freely?
- A free fan rules out a jam, not the speed signal. The manuals list the position of the Hall sensor, the fan magnet and its polarity, and a loose plug. Two owners in one thread got going again just by turning the fan by hand, and the first put it down to the magnet's position relative to the Hall sensor.
- Why does the OnTrack guide call E-06 "Over-heat"?
- Its table prints Over-heat against both E-05 and E-06. The E-06 row carries a fan symbol and a fan and Hall-sensor remedy, and the other manuals for the same panel call E-06 a motor fault. Treat E-06 as the fan code.
- E-06 and E-09 after I took the heater apart. What did I do?
- Two owners had exactly that and found the temperature-sensor plug and the fan-motor plug swapped on the main board. The two connectors are identical. Swap them back.
- What do F1, F2 and F3 mean with E-06?
- They are B2010 sub-codes. F1 is a fan motor short circuit, F2 an open circuit, and F3 means the Hall sensor is not reading the fan speed.
Where to go next
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)
- OnTrack Outdoor: LCD controller instructions V1 (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)
- Hcalory air heater user manual, M98 (PDF) (cdn.shopify.com)
- Hcalory HC-A01 toolbox heater user manual (archived transcription) (web.archive.org)
- Vevor diesel heater manual, CY-5001 / CY-5002 / CY-5004 (PDF copy) (xlrzbfnheqpszgtyhdkh.supabase.co)
- Owner report: E-06 from new, ECU cover fouling the fan (wildcamping.co.uk forum) (wildcamping.co.uk)
- Owner report: E 06 with very tight boarding around the heater (wildcamping.co.uk forum) (wildcamping.co.uk)
- Owner report: E06 after two days, fan power wires open circuit (wildcamping.co.uk forum) (wildcamping.co.uk)
- Owner report: squealing fan then E-06, fixed with a new blower (drive2.ru) (drive2.ru)
- Owner report: F2 E-06 from brush dust in the fan motor (drive2.ru) (drive2.ru)
- Owner report: E-6 cleared by turning the fan by hand (Reddit r/vandwellers) (reddit.com)
- Owner report: second owner, same hand-spin fix (Reddit r/vandwellers) (reddit.com)
- Owner report: instant E06 on a replacement board, Hall sensor out of line (Reddit r/dieselheater) (reddit.com)
- Owner report: E9 after a strip-down, sensor and fan plugs swapped (Reddit r/dieselheater) (reddit.com)
- Owner report: E-06 and E-09 until two identical connectors were switched back (Reddit r/dieselheater) (reddit.com)
- Owner report: intermittent codes on a 10 A power-station socket (Reddit r/vandwellers) (reddit.com)