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Mend Potterton Promax Combi Boiler Central Heating Thermostat

Potterton Promax Combi- hot water but no heating?

My boiler gives plenty of hot water but the c/h will not come on. The c/h water pressure is ok, the thermostat is asking for the boiler to start, but it is not. Any ideas?

Mark
November 2011
PottertonPotterton Promax CombiHeating, Home Heating SystemsCombi Boiler Central Heating Thermostat

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Potterton Promax Combi: No Heating - Help!