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Vaillant error codes

Choose your Vaillant device to see every error code with its meaning, causes and safe fixes.

Boiler10 codes

Vaillant boiler fault codes

F.22Water pressure too low F.28Ignition failure, no flame detected F.29Flame lost during operation F.25Flue (exhaust) fault F.32Fan fault F.61Gas valve fault F.64Control system error F.73Water level (pressure) sensor fault F.10Temperature sensor (thermistor) fault F.89Pump fault