Hot surge sometimes & cutting out

keeps cutting out & service light comes on, pressure seems ok, can sometime reactivate it by switching isolator switch off/on & may run for a limited time..prior to this we used to get an unexpected surge of very hot water for a short time before resorting to normal temperature, however it seems to have stopped doing this now of its own accord !
Asked 11 years ago by Anonymous
 Almost certainlly needs a new relay board.

Answered 11 years ago by Anonymous

Ours did this intermittently, the cause was a clogged shower head. try cleaning it out before you buy any parts.

Answered 11 years ago by Anonymous

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