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!!
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