Worcester 18RI boiler keeps blowing fuses?

My green star Ri boiler, no blue light on keeps blowing fuses disconnected pump diverter valve and still keeps blowing fuses

Jimnel
August 2016

Rick Thorne by any chance?

Hi mate this is Geoff, I'm gonna look at the boiler tonight.

gonna disconnect everthing that plugs into it, then replace the fuse and if it still blows its the pcb, if not its something connected to it so i'll plug in each item (fan, pump etc...) until it blows then i know whats caused it.

I've read on another forum that someone replaced the expensive pcb and it ended up being the blue transformer that supplies it was the problem, the manual says to check coils to be below 100 ohmns but thats not saying if there in good or bad condition, i guess above 100ohmns is good though pal.

oh and by the way she bought quick blow fuses when it should be slow blow so if were mega lucky it could be that

Geoff Ball
December 2011

Your boiler might have faulty fan or pump remove connection one by one and start boiler do all connection than you will notice the faulty part

ltd
December 2011