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Discuss Fog horn from boiler in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi,
We have a combo boiler and the last few weeks when running a bath the boiler has started to make an intermittent fog horn like revving sound. It doesn’t happen when the heating is on or when using sink taps. I went to the boiler when it happens and the flame icon disappears, it makes the noise for a few seconds and then seems like it fires up again. Any clues as to what’s happening?

Cheers
 

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Darren Jackson

Esteemed
Plumber
Gas Engineer
Advent Win
May need gas valve & temps adjusting, If it has been over 12 months since last service then have it serviced by a 'Registered Professional Gas Engineer'. But mention the noise prior to them coming out so they are aware of the noise it is making so they can service & investigate if necessary.
 

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