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Mend Vaillant VC GB 221 H Gas Boiler Pilot Light Heating

pilot light won't stay lit?

Vaillant VC GB 221 H
The pilot light will light as normal when button depressed but will not stay lit when button released no matter how long you hold it for

Paul
January 2011
VaillantVaillant VC GB 221 HHeating, Home Heating SystemsGas Boiler Pilot Light Heating
In order:
Pilot light not strong enough:
Thermocouple faulty:
CH limit stat faulty:
(Depending if the thermocouple links to the CH limit stat some do, some don't)
Gas valve faulty:

Carefree
January 2011

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Free repair help for Vaillant VC GB 221 H home heating systems