potterton powermax155

solomon21 · 7 Jun 2004

Can anyone help!
My potterton powermax155 boiler Heats water constantly, if the main switch is on timed or constant,it dosent matter what the timer module is set to.i think the timer module is faulty.can anyone suggest anything else it could be?
thanks

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potterton powermax155

solomon21

DIYnot Local

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