Webasto RV fault codes

Webasto makes diesel and petrol air heaters popular in vans and RVs. Faults show as F-codes on the controller or as blink counts on simple control elements.

Furnace

F00
The heater's control unit (ECU) has an internal fault, t… F01
No start - the heater attempted ignition and, even after… F02
Flame abort / flame failure - a flame was established bu… F03
Supply voltage out of range - the heater's operating vol… F04
Premature flame detection - the flame/exhaust temperatur… F07
Fuel pump fault - the dosing/fuel pump circuit shows an … F08
Drive/combustion-air motor fault - the fan motor has an … F09
Glow plug / ignition unit fault - the glow plug (or elec… F10
Overheating - the heater exceeded its safe temperature l… F14
On the Air Top EVO 40/55: the blow-out (warm-air outlet)…