New boiler causing strange noises in the radiators

[Caz6]

We've just had an Ideal Vogue 40Kw boiler installed at our home with around 16 radiators/towel rails.

Since installation, it's been causing odd noises in the radiators. I have videos showing the loud cracking, high-pitched squealing and continuous rumble (it sounds like background noise, but it's the radiator), but I can't upload them here - the file size is too big.

I expect some expansion noises but we never had any before. The fitters are coming back tomorrow to look at it, but I could just do with knowing - are these "normal" noises attributable to having a more powerful boiler?

 

[muggles]

What boiler did you have before? Why such a powerful one, is it a combi?

 

[Deleted member 294929]

Was the system powerflushed?

 

[Caz6]

Previous boiler was a Vitodens 100 35kw. It was fitted when we had a warm air heating system. We had radiators fitted 6yrs ago and it was ok to start with but struggled recently and hot water had problems too. It was 13yo. Hence a slightly bigger boiler.

I don’t know about powerflushed… they put a fluid in but I didn’t hear power flushing…would I have?

 

[dal5band]

It may be the pump is too vigerous causing the whistling - particularly in TRVs. Don't know if you have settings on the pump like you have on pumps external to the boiler ?

 

[Caz6]

Thanks! That matches with what they’ve suggested. They’ve said they’re going to turn down the pump speed today. Will monitor it ver the weekend.

 

[Caz6]

So they came on Friday and fixed a problem with one radiator not working and turned down the pump but the noises remain. I’m linking a couple of videos below and would really appreciate your assessment as to the cause and cure of both. To recap, we have Tado on most of our radiators and a new Ideal Vogue 40kw boiler.

Cracking noise, happens on one radiator only and not on the first heat up (from cold) but does on every subsequent heat up.

Wooshing noise happens on some radiators

Thanks in advance