i have a maxol super combi he 28 with the error code 20 coming up Anyone what the fault is???

dai, December 2010

error code 4 is no flame detected but that does not mean there was no flame . poss faults r gas valve stuck . no spark due to defective leads . defective flames sensor or lead .defective pcb due not reading flame. or blocked condensate trap as water will give pcb a direct earth link ps i am the best boiler breakdown engineer lol

adam baker, November 2012

hello my boiler wont stay lit and keeps going out and its flashing number 4 can you help me

mark irving, November 2012

yes please I have the same error code too!! Trying to find out now, please liaise with me as I am freezing!!

Niqui, December 2010