Alpha C27 Squealing When Hot Water is on

[kendo2748]

Hi, I have a Alpha C27 Combi Gas Boiler which has started making a squealing noise when the hot water is on, no noise with central heating. It still makes the noise when the boiler is switched off at mains and hot tap running

I have found that if I reduce the water flow at the mains stopcock the noise goes away, however I would prefer a higher flow rate.

So I would be pleased to receive your thoughts/comments to what this might be, i.e. heat exchanger/flow regulator

 

[Alpha man]

Sounds like a tap to me!!

 

[kendo2748]

No definitely the boiler as the noise happens when any of the hot taps in house are on, I thought it might be a flow regulator fault or even the heat exchanger.

Anyone any ideas

 

[SimonJohns]

I would say you have a slight breakdown of a part inside of your boiler.

To which I can't say. But shouldn't cost you much to have repaired by a suitably qualified engineer

If you wish to have a go on your own. Good luck. Will prob cost you more in the long run!!