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  1. J

    vaillant boiler cuts off

    Hello everyone, Posted yesterday but now my vaillant boiler model vc gb 110 h. Now I can light the pilot but the boiler fires for 30 secs to 3 min then cuts out and switches off the pilot light. Can relight but happens again. Had the expansion vessel and thermocouple replaced. Any...
  2. J

    valliant boiler pilot wont stay lit

    Hi everyone, Need help!! I have a valliant VC GB 110 H boiler. Replaced thermocouple, had expansion vessel replaced yesterday and was working till this morning. Now pilot light will light but when i release the button it goes out. Boiler makes all the right noises and wants to work...
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