cold radiator

[flitty]

I have a closed system run off a combi boiler. The radiator downstairs is always cold even on high setting on the rad thermostat. I have bled it and the water comes out clean yet it remains freezing cold and the water coming out also is cold yet all other rads work. Any ideas ?

[Tuvok]

Check the thermostat on/off control - it could be that the pin is stuck.

[wardlaw]

I agree with Tuvok. Stuck pin sounds right to me.

[flitty]

sorry if i am being ignorant but where is the pin and how do i get at it

[Tuvok]

Does your thermostat lokk similar to this

http://www.google.co....HYDg&ved=0CKwBEPICMA0

If so, you take off the bit with the numbers and find the pin in there. Or get a friend to do it for you. Just pull the pin out and put it back in - you want movement in the pin.

[flitty]

its a really old one with numbers on

[Tuvok]

Look at where it joins the radiator. Do you see where it clamps on - unscrew the screw holding the clamp tight. Take the numbered bit and clamp assembly off. Do you see the pin? Pull it out - probably need a pliers. Put it back in - then press it - does it feel like its moved in? Now put the numbered bit ack on, tighten it and finger crossed it will work when you turn it.

[Tuvok]

I had to do this each year in my work office!

[The Builder]

Any luck with the pin Flitters?
It should spring up on its own after you've removed the head (knob with numbers on it).
If it's stuck down, tap it a few times with a mallet.