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Mend Flexicom 30cx Boiler Heating Hot Water

F_5 F_6?

flexicom 30cxboiler my demand for hot water is flashing between F-5 and F-6 when my heating is off can you tell me what is causing this

ann
February 2015
FlexicomFlexicom 30cxHeating, Home Heating SystemsBoiler Heating Hot Water

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Flexicom 30cx F5/F6 Error - Hot Water Issue