hi i have a pro 25 he combi the boiler is not firing up . the fan and pump are running normal but there no spark . if u take of the inside cover the boiler works fine
Gas/ventilation issue, I'm pretty much certain I know what's up with it but I can't give that info out on the open forum as it's against the rules. Get a qualified engineer in, running the boiler with the cover off is not advisable, don't do it
Neil, as the others have said, as a DIYer, you're strongly advised NOT to remove the combustion chamber cover, let alone attempt to run the boiler without it in place.
It's not lighting for a reason, probably because the boiler's electronics are being told that something's not right (i.e. is potentially dangerous) by the various sensing devices.
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