thanks for the replies gents yes i am gas safe registered i thought this was going onto the combustion chamber section. i havnt used this site alot so dont quite know how to work it tidy yet. the reasn i stated the fan could be at fault is that it aint going to ignition stage as without...
went to a breakdown earlier today for no htg or hw. with the casing on the boiler would get to the fan running stage and then i would get fan flue light on, once casing is removed the boiler would fire up instantly ive replaced the air pressure switch but still geting the same problem. any ideas...