Combi Boiler heats radiators when hot water only is selected. | Boilers | Plumbers Forums
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Discuss Combi Boiler heats radiators when hot water only is selected. in the Boilers area at Plumbers Forums

Messages
9
My combi boiler has started heating the radiators when I select hot water only. Any ideas ? The system has been in for maybe 10 years.
 

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