Vaillant Fault Code F.72Richard WeedonFeb 28, 20211 min readF.72Fault: Flow/return sensor: Flow/return NTC temperature difference too great → flow and/or returntemperature sensor defective Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford
F.72Fault: Flow/return sensor: Flow/return NTC temperature difference too great → flow and/or returntemperature sensor defective Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford
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