Hello all,
Many months of DIY has seen me various remove and replace most of the radiators in our two-bed, ground-floor flat. At all times, I have been careful to note the setting on the lock valves, hoping to prevent any balancing problems. The system is fed by a Volera combi boiler.
All the DIY finished a while back and, during each stage, I have tested the various radiators - and no problems.
However, both the radiators in the two bedrooms have been off for a while (we have not been occupying these rooms). Now that I try to use them, they remain steadfastly cold. I have bled them completely, and double-checked that the lock valves are open as before the DIY. Also, I have had these rads working -- it's just that they've been off for a few months since the last test.
Today I have attempted various trial-and-error troubleshooting. I have stopped because of the following, and would appreciate any guidance: having turned off the control valves on three *working* radiators in an attempt to 'force' the hot feed to the cold rads, my combi boiler starts to make a frightful noise -- at which point I bottle out, switch it off and, well... come onto DIYnot!
Obviously, I'm not a central-heating expert and will call in a plumber if that's the most sensible option, but I'd like to hear any opinions of what might be the cause here. The layout of this flat suggests that the two bedroom rads (which are cold) may be fed by a separate loop, if such a thing is possible. I'm wondering if an air-lock might be causing this and, if so, would draining the system be a next good step?
Cheers,
Harry.
Many months of DIY has seen me various remove and replace most of the radiators in our two-bed, ground-floor flat. At all times, I have been careful to note the setting on the lock valves, hoping to prevent any balancing problems. The system is fed by a Volera combi boiler.
All the DIY finished a while back and, during each stage, I have tested the various radiators - and no problems.
However, both the radiators in the two bedrooms have been off for a while (we have not been occupying these rooms). Now that I try to use them, they remain steadfastly cold. I have bled them completely, and double-checked that the lock valves are open as before the DIY. Also, I have had these rads working -- it's just that they've been off for a few months since the last test.
Today I have attempted various trial-and-error troubleshooting. I have stopped because of the following, and would appreciate any guidance: having turned off the control valves on three *working* radiators in an attempt to 'force' the hot feed to the cold rads, my combi boiler starts to make a frightful noise -- at which point I bottle out, switch it off and, well... come onto DIYnot!
Obviously, I'm not a central-heating expert and will call in a plumber if that's the most sensible option, but I'd like to hear any opinions of what might be the cause here. The layout of this flat suggests that the two bedroom rads (which are cold) may be fed by a separate loop, if such a thing is possible. I'm wondering if an air-lock might be causing this and, if so, would draining the system be a next good step?
Cheers,
Harry.
