My Potterton Suprima 40L Boiler Won't Sut Down

sporticus | 12:22 Sun 08th Dec 2013 | How it Works

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My Suprima 40L boiler won't shut itself down, even if it exceeds the thermostat required temp. We have to shut the system down by flicking the fuse switch to off. Even when we move the CH control panel to off and switch the fuse back to on the CH kicks back in and superheats the house using lots of gas!! A British gas engineer who serviced the system said it could be 2 things. 1 - some sort of frost setting?? or 2 - a problem with a switch by the hot water tank which is part of a high pressure system, I have looked and I have no idea what the switch might be. I was advised that when it happens again(like today) to leave the system running for them to see....however the house gets up to 28 degrees + and it wastes lots of gas, costing us lots of money.

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Iggle Piggle

The Potterton Suprima range suffer from circuit board failure (usually dry solder joints) Most Plumbers and technicians know this and will pop a new circuit board in. It sounds dodgy but give the right hand side of the boiler a good whack with the palm of the hand or a rolled-up newspaper (to save the hurt) and see if the boiler changes behavour ...

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