I have a 7 year old Potterton Suprima 80 and recently it stopped working suddenly. Power and light were still on at the timer switch/controller but all lights on the boiler went out.
I found the fuse on the PCB (T3.15) and sure enough it had blown. I replaced that fuse twice(!) and both fuses blew within minutes of the boiler being powered back up.
I have just replaced the entire PCB, and its fuse blew straight away when I powered it up. Before I invest in a visit from the plumber, are there any obvious causes of the fuse blowing like this I can eliminate?
I found the fuse on the PCB (T3.15) and sure enough it had blown. I replaced that fuse twice(!) and both fuses blew within minutes of the boiler being powered back up.
I have just replaced the entire PCB, and its fuse blew straight away when I powered it up. Before I invest in a visit from the plumber, are there any obvious causes of the fuse blowing like this I can eliminate?