My Ideal Response 120 boiler keeps fusing the house electrics at the mains fuse board - the CH/hot water are available for about 40 mins and then it blows. A new diaphragm water pressure switch was fitted 5 weeks ago - could this be to blame?

John S, February 2007

have you checked for any internal leaks on to pcb. or electrics

hi-spec plumbing, February 2007