Fault Codes

Listed below are the common Warmflow fault codes as described by the boiler manufacturer along with a possible cause.

Warmflow Boiler Fault Codes

Fault CodeSystem Behaviour
E01 No flame – flame has failed during startup.
E02 Safety thermostat tripped (95°C)
E03 Flue thermofuse tripped
H20 Low system pressure
E05 Heating sensor fault
E22 Fan fault
E16 Parameter programming request
E35 Ionisation electrode fault
E42 Fan printed circuit board (PCB) fault