Chinese diesel heater showing an error code? Start with the controller.
E-03 on one controller is a glow plug fault; three flashes on another is a voltage problem. This site sorts the codes of Chinese diesel air heaters (Vevor, Hcalory and unbranded 2 kW, 5 kW and 8 kW units) by controller, then walks through the checks, cheapest and safest first. Every page lists the manuals and owner reports it is based on.
Step 1: 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
Step 2: look up the code
See every code for every controller in one table, or jump to a 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
No code, or the code keeps coming back?
Fixes by symptom and by job.
- Reset a locked-out heater
- White smoke and no start
- Tries to start, then E-10
- 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
How this site is put together
We do not own a test bench. Each page is compiled from manufacturer and seller manuals and from what owners report on public forums, and it says which is which: the manual states versus owners report. Where the sources do not give a number, we do not make one up. More about the method.