A couple of upstairs radiators at my aged parents house were very cold and suspect needed bleeding. Having bled them they are now red hot - excellent.
However, the downstairs radiators are now mostly cold. Tried bleeding them and they are fine.
All the flow valves are fully open (and not changed since before bleeding any radiator). The pump is very noisy, but seems to be providing plenty of flow rate.
Any ideas what might be wrong?
However, the downstairs radiators are now mostly cold. Tried bleeding them and they are fine.
All the flow valves are fully open (and not changed since before bleeding any radiator). The pump is very noisy, but seems to be providing plenty of flow rate.
Any ideas what might be wrong?