Chinese Diesel Heater RV fault codes

Low-cost 2–8 kW diesel air heaters (sold under many names such as Vevor, Hcalory and Happybuy) share a common controller. Faults show as E-codes on the LCD remote.

Furnace

E1
Most commonly under-voltage: the heater senses supply vo… E2
Most commonly over-voltage: the supply voltage is above … E3
On the widely-sold Vevor-style controllers E03 indicates… E4
On Vevor-style controllers E04 indicates a fuel pump fau… E5
On Vevor-style controllers E05 is an over-heat (over-tem… E6
On Vevor-style controllers E06 indicates a fan / blower … E7
On Vevor-style controllers E07 is a communication / brok… E8
On Vevor-style controllers E08 is a flame-out / low-fuel… E9
Commonly a glow plug / ignition-circuit electrical fault… E10
Two documented meanings: (1) repeated start-up failure —… E11
Glow plug / heating-element performance fault: the plug …