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I have a Potterton suprima boiler which keeps blowing the 3 A fuse on the boiler PCB.
anyone got an intimate knowledge of the suprima PCB? what circuits does the onboard fuse protect?
The problem occurred naturally, after a fairly extended period of not using the CH system at all.
The problem does not appear to be the board (have tried 2 boards, both produce same fault),
it's unlikely to be the circulating pump (wiring checked & pump spindle turns freely)
it doesn't appear to be the gas valve (meters OK)
anyone got an intimate knowledge of the suprima PCB? what circuits does the onboard fuse protect?
The problem occurred naturally, after a fairly extended period of not using the CH system at all.
The problem does not appear to be the board (have tried 2 boards, both produce same fault),
it's unlikely to be the circulating pump (wiring checked & pump spindle turns freely)
it doesn't appear to be the gas valve (meters OK)