Davey wrote:
On Sun, 29 May 2011 08:51:49 +0000 (UTC)
Dean Heighington wrote:
Moonraker wrote:
I have a valve sticking on one of my radiators. It comes on when
called but does not go off (at least we are warm :-) ) I have
swapped the actual heat sensor part with another radiator to no
effect. Is there anyway to free the valve, as I don't want to have
to drain the whole system to replace it, which seems the only other
option.
I usually unscrew the head, turn it upside down and use it to work
the pin slightly, till it frees up... THEN, I do get my tools if
it still sticks and a can of WD40/PlusGas/silicone grease/whatever
and lubricate it. It may be sticking cos it's leaking slightly.
I have just moved into a house fitted with these, Honeywell made. They
all seem to work more like a setting valve rather than as a
thermostat. Do I not need to drain any water, just undo the head
somehow, and then find a pin under there? I haven't tried anything
yet, other things need more attention!
No, you don't need to drain anything to get at the operating pin - although
if the valves are completely knackered you will have to drain the system
down to replace them of course.
There are various ways of removing TRV heads - with some you might need a
hex key - with others you simply rotate the head to the 'hottest' setting
and slide a collar back to release it.
--
Kev