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Vaillant Fault Code F.23

F.23

Safety switch-off: Temp.spread too large: Pump blocked, insufficient pump output, air in product, flow and return NTC connected the wrong way round



Landlord gas safety inspection Cheshunt, Ware, Hertford
Landlord gas safety inspection Cheshunt, Ware, Hertford

 
 
 

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LEAKS FIXED

Ware, Harlow, Hertford, Broxbourne, Hoddesdon, Roydon, Epping, Loughton, Woodford, Chingford, Enfield, Edmonton, Tottenham, Wood Green, Crouch End, Holloway, Hackney and Central London

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