Boiler self starts when controller is turned off

missclp · 16 Feb 2008

Can anyone help me I have a Potterton Envoy 50 and a British Gas UP1 Controller, the boiler sometimes fires up when the controller is turned off and the only way to turn the boiler off when this happens is at the mains.
Many Thanks

gas4you · 16 Feb 2008

Sounds like a motorised zone valve actuator fault.

missclp · 17 Feb 2008

Many Thanks for your help.

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Boiler self starts when controller is turned off

missclp

gas4you

missclp

DIYnot Local

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