My Baxi boiler on light comes on when hot water/heating is called for and thermostats are set high but then nothing happens. Initially this was intermittent but now seems permanent. I have gone through the Baxi boiler manual fault checker and it seem to suggest I need a new PCB. How would I know for sure?

Andrew, September 2009

Thanks Ian. No the fan does not run nor the light come on. I have checked the fuse on the PCB and this is OK. Any other checks I could carry out before investing in an expensive new PCB??

Andrew, September 2009

does the fan run or the fan on light illuminate? if not then it probably is the pcb.

Ian, September 2009