ravenheat boiler

I have a issue with my ravensheat CS80. Pcb fuse keeps blowing. When i change the fuse, boilers works (hot water and central heating) for about between 15-30 mins then fuse pops. Any diagnosis or suggestions on where to look for the issue??

Hi I am new to this site but wanted to ask a question about a fault which has arisen on my Ravenheat Boiler. In the last day it has stopped delivering hot water either to the taps or the CH. The pilot remains lit, the boiler fires up and I can hear the fan working. Occasionally I get about a...