how to fix my baxi boiler?

boiler is firing up green light comes on here the fan go round but then every 3 seconds there is a clunking noise this continues, then it fires up again and clunking noise then cuts out and red rest button comes on

mal
January 2010

first things first.once you have reset the boiler? can you hear the fan run? if so you should then hear a faint click, you might need to put your ear to the boiler for that one, thats the air pressure switch working from the fan, with that working. you should then be able to hear the boiler ticking, this is it trying to ignite the gas. if you can hear the clicking but its not lighting your getting no gas to the burner chamber or its sparking in the wrong place. so in summary no clicking either the electrode an lead need replacing, failing that the p.c.b if you can hear the clicking but its not lighting, blocked gas injector or gas valve needs replacing, failing that pcb again. o an if it does light up but only for a second or two, the rectification device is no good an needs replacing failing that again pcb, all that said the only person that can really get your heating back up and running is a gas engineer

mac
December 2009

you need to change your pressure switch first.As you ask the boiler to light it goes in this sequence
1.pump runs
2.fan starts
3.pressure switch makes
4.boiler goes into ignition mode.

mark
December 2009