Last week I had a new boiler fitted. Its external and no controller fitted yet so I have to switch on/off at wall.. whenever I adjust TRV I can hear the water flying through the rads... not the bubbling noise of air just a loud whooshing noise... this didn't happen with old boiler but this one is a more powerful boiler (there will be 4 more rads coming online in the extension next week).
Is this to do with the rads not being balanced yet?
Is this to do with the rads not being balanced yet?