Richard WeedonFeb 28, 20211 min readVaillant Fault Code F.74F.74Fault: Water press. sensor: The line to the water pressure sensor has a short circuit to 5 V/24 V or internal fault in the water pressure sensor Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford
F.74Fault: Water press. sensor: The line to the water pressure sensor has a short circuit to 5 V/24 V or internal fault in the water pressure sensor Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford
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