my central heating boiler will not turn off at room thermostat and if i switch boiler to hot water only it still does not turn heating off i have to turn boiler of
Sounds like it is nothing to do with the boiler itself. It is most likely the three port valve (in the airing cupboard?). It could be you have some clothes on the override switch or dust in the box but most likely the valve requires replacing.
Peter
November 2009
Automatic Answer
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