In the summer one of my gas CH radiators sprung a small leak. I shut
off the water supply, drained the radiator and fixed the leak. I
reintroduced the water to the radiator but when I turned the Central
Heating on for the winter, this one radiator remains cold.
I have opened the bleeding valve and after about 20 minutes, the
radiator gets warm as "new" hot water flows in to it, but it cools
down. I've checked the thermostat valve on the radiator and it seems
to be working fine. There is no air in the system and the water coming
through the radiator is very clear so I doubt there is sludge.
Any ideas anyone?
For whatever reason, the flow is not happening through the radiator.
This either means that there is an airlock in one of the pipes or that
the system is out of blanace, or that there is indeed, sludge.
I would start by closing all radiator valves except that for the one
in question. Open its lockshield valve and turn up the pump if need
If that doesn't work, then it is likely that the system needs to be
To email, substitute .nospam with .gl
With what did you repair the leak, dear Henry ? :-)) (sorry, couldn't
resist the urge)
Have you made sure that both valves are fully open ?
When you were tightening the valves back up, did you kink any of the pipes ?
Is the stuff you fixed the leak with, covering, or slightly covering, any of
the water ports ?
Did you put any PTFE tape on the joints ? If you did, then make sure that
it is not covering the end of the pipe or fitting when you tore it off to
The thermostatic valve head is on properly ? Sitting in its key slot
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