potterton puma 80e

23 Jan 2010
Reaction score
United Kingdom
hi. im trying to findout wot is the fault on my boiler.
its a potterton puma 80e. the problem is after about 5 seconds or so after flame igniteing the unit goes to lockout. doesnt seem to be associated with overheating. this fault is hapening wether it it hot water demand or central heating. any help appreciated. to add the sequential board has been changed, pressure in system is fine, fan and pump is runing.
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rads have been vented thanks, and when the burner fires it looks a good flame with plenty of pressure. i had thought it maybe flame detector at fault, hear they arnt a common thing to fail tho. modulator board fault maybe? hear there a common problem. funny how its a problem on both water and heating sides. anymore ideas?

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