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Mend Potterton Netaheater Profile 60E Boiler Heating System Pump

potterton netaheater profile 60e?

System works fine for two days then goes mad i.e pump keeps running and boiler turns self on then over flows in header tank making boiler trip out. Two way valves work but the one under central heating pump if overiden manually makes water go round the system and then the pump stops and goes back to working normally again.

Jimmy
October 2010

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