Hi, I changed the PCB on my 4 year old boiler as I was told this was the problem with it not starting. I switched the boiler on and got a flash and bang from the fan. Is it worth now changing the fan?

Mark, September 2015

There is normally a 3 amp glass fuse on the PCB
I believe Worcester normally leave a spare one inside the PCB cover
Try replacing the glass fuse on the PCB BUT leave the fan molex disconnected
Phone Worcester technical helpline to help guide you through the rest of the test procedure
You will require a multimeter at hand

Q, September 2015

Well there's a choice

Leave the fan as it is = no heating or hot water
Change the fan = Medium expense
Have the fan changed for you = more expensive
New boiler = very expensive

You can always remove the fan and bench test it before you decide.

Good Luck..., September 2015