Vaillant Fault Code F.56


Safety switch-off: CO limit exceeded: Safety switch-off: CO limit exceededA component in the combustion regulation is defective– Contact fault at the gas valve (plug not plugged in correctly or not plugged in, plug defective, slot is defective (loose connection))– If the fault occurs again after being cleared: The gas valve is defective

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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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