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Vaillant VCW GB 242EH combi boiler?

CH flame failure due to low water pressure. re- pressurised but wont ignite. pump , fan & DHW working OK

joe
November 2009
is diverter moving off microswitches on left hand side at bottom ifso possible faulty servo valve or blocked banjo tubes

c
December 2009
Try venting the boiler.

dave stewart
December 2009

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