New boiler, radiator problems.

Gammon107

A couple of months ago I contracted a company to install a new combi boiler and heating system in my house. They installed the Worcester Bosch boiler, supplied a number of new Stelrad radiators and fitted Danfoss valves on all the new radiators they supplied as well as on the exisiting radiators which they did not replace. I have 3 bedrooms and none of these rooms had new rads, just new valves and since this system was installed, the rads now emit a billowing air sound from them. They sound like hot air blowing machines rather than radiators. They didn't sound like this before the work was done. I simply cannot get the guy who fitted the system to respond to me and come out to fix it. I have contacted him by phone, text and e-mail numerous times and have sent him videos of the noise the radiators now make. I had hope to upload this video here but seems there's no facility. Anybody with any proficiency in this area suggest what might be causing this rushing-air sound to come from my radiators? And what can be done to fix it?

WentworthFox

Gammon107 wrote: »

A couple of months ago I contracted a company to install a new combi boiler and heating system in my house. They installed the Worcester Bosch boiler, supplied a number of new Stelrad radiators and fitted Danfoss valves on all the new radiators they supplied as well as on the exisiting radiators which they did not replace. I have 3 bedrooms and none of these rooms had new rads, just new valves and since this system was installed, the rads now emit a billowing air sound from them. They sound like hot air blowing machines rather than radiators. They didn't sound like this before the work was done. I simply cannot get the guy who fitted the system to respond to me and come out to fix it. I have contacted him by phone, text and e-mail numerous times and have sent him videos of the noise the radiators now make. I had hope to upload this video here but seems there's no facility. Anybody with any proficiency in this area suggest what might be causing this rushing-air sound to come from my radiators? And what can be done to fix it?

I would suggest bleeding your radiators first. (If you don't know how I would YouTube it on a How To)
Go round all your radiators and release all the air that is in the system. once this is done add pressure to your boiler if the pressure gauge has dropped below 1.5bar. Run your heating and see if this cures it.
Can I ask did you have a power flush done to your full heating system before the work started on the new boiler?

StuC75

Another one for the bleeding air out the radiators, but also check what pressure the system is running at-look on youtube for videos on this will help in ensuring it is balanced properly.. would need to check that the old piping is upto task on the new system - when I had one installed I was advised that they couldn't guarantee nor deal with issues with the old pipework..

In this case the installer has covered there work - it could be argued that it is down to the older part of the system (outside of what they worked on)..

Crinkmeister

Either air in system as others have said or it might be the TRV vibrating if it's near it's operating temperature. Try turning valve up or down and see if the noise disappears. If noise is still there, then air is your problem and you need to bleed it out as suggested by WentworthFox and StuC75.

Ruski

Bi directional valves fitted?? Even so, some need adjustment - this may be the problem as most 'whistling' valves are because they're installed on the return and ot the flow.

Check which end of the radiator gets hot first.

HTH

Russ