Have the above boiler blowing fuses then ruins the circiut board, checked fan (108 ohms on the red- blue ) and gas valve all seem ok. after 10 mins its blows the 3.15 A fuse along with the pcb.
any ideas
apart from get a new boiler, this ones only 2 years old and the customer has also a isar combi also
any ideas
apart from get a new boiler, this ones only 2 years old and the customer has also a isar combi also