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Mend Ferroli Optimax HE 31 C Boiler Heating

I have a ferroli optimax he 31 c boiler ?

The heating just seems to turn on and off randomly having not been programmed.Any idea why ?

Paul millar
January 2018

Ferroli Ferroli Optimax HE 31 C Heating, Home Heating Systems Boiler Heating Ferroli

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Ferroli Optimax HE 31 C Boiler - Random Heating