vokera 14se fires up but flame fluctuates then drops out. it stays on if i take the boiler burner casing off. tried changing the fan and the ignition board. flame sensor seems ok.
have you cleaned the venturi that's on the fan, or checked the air-pressure-switch, examine the integrity of the flue?
A qualified engineer would be looking at these before throwing parts at it.
Big A
March 2009
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