boiler/ flue noise
 

Anyone good with strange noises from boilers? I have a Glow Worm II
boiler that has been making a racket for some time and I think I really
ought to fix it or get someone in. It started about 3-4 years ago, when
a noise reminiscent of whale song could be heard each time the main
burner came on. Since then, it has been getting louder and louder and
now it is a dreadful, screeching, juddering noise of varying pitch. The
noise seems to be coming from the flue and, for want of a better
description, it sounds like high pressure gas passing through a
restrictive aperture. I should mention that it only occurs when the
ambient temperature is low (at best guess, when less than 4 deg C). Any
ideas? Is there a valve that regulates exhaust gas flow in the flue and
could this be the problem? I had imagined that the flue would just be a
simple chimney.

Thanks in advance, Jim,

"Jim Walsh" wrote in message
...
Anyone good with strange noises from boilers?

Yes. Our 20 yo Apollo has started moaning and grunting and, at times,
shuddering ...

I'd like to replace it anyway (not with a combi) but Spouse keeps promising
to fix it.

When he gets round to it ...

Mary

My balanced flue boiler does the same whale noises - it's caused by the
resonance of the flue by the exhaust gases escaping and only occurs when
it's cold/still outside. You can sort it by wedging a metal rod of the
right length between the sides of the flue on the outside....

Chlo


"Jim Walsh" wrote in message
...
Anyone good with strange noises from boilers? I have a Glow Worm II
boiler that has been making a racket for some time and I think I really
ought to fix it or get someone in. It started about 3-4 years ago, when
a noise reminiscent of whale song could be heard each time the main
burner came on. Since then, it has been getting louder and louder and
now it is a dreadful, screeching, juddering noise of varying pitch. The
noise seems to be coming from the flue and, for want of a better
description, it sounds like high pressure gas passing through a
restrictive aperture. I should mention that it only occurs when the
ambient temperature is low (at best guess, when less than 4 deg C). Any
ideas? Is there a valve that regulates exhaust gas flow in the flue and
could this be the problem? I had imagined that the flue would just be a
simple chimney.

Thanks in advance, Jim,