Help - noise coming from my chaffoteoux and maury boiler

[mgallagher1]

Hi, I wonder if anyone can offer any advice,

I have a Chaffoteoux and Maury Sterling PP Combi Boiler fed straight from the rising main. The central heating is perfect, but after the hot water is run for a few seconds it begins to sound like a Jumbo Jet is about to land on the roof!

This sequence repeats itself until the tap is closed, bringing the noise to a grinding halt.

Does anyone have any idea what the problem could be and/or how to fix it? Thanks

 

[ianmcd]

Sounds like you have a combustion problem, sorry but only an RGI can sort this for you

 

[bazdaman]

Mucky main heat ex is my guess