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model VCW GB 242 EH vaillant combi boiler ignition problem?

occasionally, when the boiler ignites,the burners light and then go off, then on, then off again sometimes up to 5 times before igniting properly. Sometimes, very occasionally locks out. Anyone with any ideas on this fault.

John
May 2007

Vaillant Heating, Home Heating Systems Combi Ignition Problem

Sounds like it could be either a flue fault or flame recognition problem. Vaillant are a very robust boiler and they don't tend to suffer from trivial faults.
Either way it's going to be something involving gas or flue inside the burner chamber which requires corgi engineer. Sorry.

T.h.s
May 2007

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model VCW GB 242 EH vaillant combi boiler ignition problem?

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