My boiler continuously clicks on and off, probably around 3 or 4 times a minute and the combustion flame bursts loudly into life every time it ignites. The thing is it only does this during the winter months when my central heating is on, as when heating the water it is OK and operates normally.

It also plays havoc with my freeview TV reception, in that my picture breaks up and cannot be watcged until my boiler is switched off!

I have had my air pressure switch replaced recently, however to no avail!

Any thoughts would be much appreciated?

Kenny Metvern, November 2010

Got it sorted, thank heavens, it transpired that an end cap had fallen off and not enough oxygen was getting to the boiler. This was resolved by a wee touch of silicone on the cap and "glued" back into position. Hey Presto!

Kenny Metvern, November 2010

sounds like the synchron motor in your divertor or zone valve is dropping out the end switch

wrinklyjoe, November 2010