I have a sealed central heating system with TRVs on all but one radiator. Radiators are on 10mm plumbing. When the room temp is getting close to the TRV setting, the radiators make a really high-pitched whistle, sometimes for many minutes before the TRV shuts off the radiator. It's definitely the TRV causing this, as I can stop it by adjusting it either up or down a small amount.
Is this symptomatic of any problem? Is there a way to stop it?
Thanks
Is this symptomatic of any problem? Is there a way to stop it?
Thanks