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Mend Fertech 31C Boiler Heating Electrical

my fertech 31c is flashing f35?

my fertech 31c boiler is flashing f35 this means electrical supply problem. how can i fix this?

paul
December 2011
FertechFertech 31CHeating, Home Heating SystemsBoiler Heating Electrical

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Fertech 31C F35 Error - Boiler Help