Hi, I have a Powermax 155 Boiler. When it starts first the fan runs without any noise. after about 10 seconds, the boiler fires, and at that point the noise starts. the noise is very loud on the the Air Inlet Pipe. From outside my property I could hear the noise from the Flue Terminal Assemly Box (Balanced flue). the boiler is on timer mode. the noise is worse in the morning (the first firing after bing off overnight). I suspect the fan, but if so why the fan dosen't make any noise for the first 10 seconds as the boiler starts?

Any help will be very much appreciated.

Many thanks.

Toumi, October 2008

I am not gas engineer but presume that the burner will take some time to get to full burn so maybe that why their is a delay.

I have Powermax 185 boiler; it has omitted whistling noise since I moved into house (14months). Usually when first starting central heating (hot water only produced no whistling) and stopping after 30mins to an hour later; you could hear noise outside of house.

Last week the central heating ceased to work' the engineer said today that the pump had ceased but alos mentioned foreign object in pump. I got local gas repair company in and claimed it would be cheaper to get new boiler rather than fix whistiling. After reading other articles (showed success with Baxi engineers). I called HeatTeam of baxi website http://www.baxi.co.uk/aftersales/repairs.htm

I was qouted £299 for fixed cost repair including one year of cover on boiler; payable over 6 months interest free. They came today; fixed central heating (was programmer unit and pump) and also stopped whislting noise. Whistling was apparanetly issue with water pump and foreign object in pump. Was fixed in 90mins.

Was worth £300 just to get rid of whislting noise; never mind fixing central heating.

Tim, November 2008

if its a whistle/whine its down to the gas valve

iain, October 2008