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check your inline filter @ pressure reducing valve

why not stick one of these on it http://www.thegardenersshop.co.uk/frost-protection-tap-cover-114-p.asp

if you run a hot tap slow does the boiler flame modulat down if you adjust the ch temp on boiler control panel down when its running does the flame modulat?

did you do a flow test through the two heat exchangers when they were take out to clean? F3 = heat exchanger blockage

has the central heating output been set correctly? Setting the central heating output The central heating output must be set in accordance with the system requirements. Setting procedure as follows: • Push and hold the Bar/Mode button for at least 8 sec. The display will switch to...

If you want a Biasi I'd recomend you buy two so you got spairs at hand :) what part of cardiff are you in? I live 10 mile out side cardiff.

it has a heat input of 27Kw Dhw flow rate of 8l/m @ 40*c temp rise. why do you need to replace it?

you have already committed the offence of "illegal gas work" by removing the combustion cover from the boiler. can you test for 240v at the fan connections? if present then you would be right in suspecting the fan. if not then it could be pcb or other component eg flow switch, pump. its...

I've come across this problem on several of my customers boilers, like your efforts i tried the new trap, flush the condensate pipe route to no avail. one boiler i was back to once a week, after 4th visit i decided to try something drastic. i found that there seems to be an air lock between...