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Writer's pictureRichard Weedon
Feb 28, 20211 min read

Vaillant Fault Code F.70

F.70

Fault: Invalid Device Specific Number: If spare parts fitted: Display and PCB replaced at same time and DSN not reset, incorrect or missing output range coding resistance




Vaillant Fault Code F.70, Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford
Landlord gas safety inspection Enfield, Potters Bar,Cheshunt, Ware, Hertford

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