cold radiator

[inod]

Is it common to have a cold radiator on a newly drained down system. A friend of mine has just bought a house and one of the radiators isn't working. He has had it a week, and I thought the problem was a sticky thermostat, so I dreained it down for him, fitted a new thermostat, and re-filled the system. The radiator is still cold, although te flow pipe get hot (after a little while though). I think that the radiator is served by the flexible pipe (not copper), but I'm not why this would make a difference.

Any suggestion would be helpful

 

[Rob]

Have you tried turning all other rads off this increase pump pressure which may clear an airlock

 

[gas4you]

Check the lockshield is fully opened and as rob says turn all others off, turn off hot water if it is a standard system, shut bypass valve and put pump on full speed.

 

[inod]

Thanks guys - I'll pop over and try both those tomorrow.