when hot water or heating starts on the boiler sounds like a plane is taking off the stops after around 3-5 minutes.changed diverter & auto bypass.also changed the pump? any help please?
Hi
Have the same problem on mine, boiler fires up at 6.30 in the morning then 7 mins later the noise starts.
suspected at first the fan flue (see previous reply).
however as the noise always starts 7 mins after boiler firing i can only assume its something to do with trhe modulation of the burner flame. hope this helps.
Simon Mills
November 2008
similar problem on mine and i suspect its the flue fan
simon mills
October 2008
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