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Valliant Boiler help?

Hi

I have a 3 year old Vaillant wall mounted gas boiler which works perfectly well with the front cover removed. When the cover is fitted again the boiler runs for a few minutes then cuts out again, take off cover, refire and all is ok? Grateful for any help.
Mac G, July 2009
If it's one of the condensing models (ecotec etc) then the air / gas ratio will be incorrect and need to be adjusted by a qualified engineer with a performance testing machine / telegan.

Ian, July 2009
sounds like either a fault with the flue or the venturi in the fan, best to get someone out who knows what they are doing.

steve, July 2009
link Click here to see other fixes for Vaillant.