Partly cold radiator

[captnkirk]

I have a bathroom radiator about 3 years old which is cold in the upper quarter in the corner opposite the bleed valve (else I would bleed it away), the rest of it is lovely and hot. Grateful for any advice before I tinker, both valves seem open ok, should I bleed it anyway or could it be something less obvious?

 

[JohnD]

bleed it of course.

the side with the bleed valve should be a tiny bit higher than the other side. Definitely not lower.

so the bottom and middle of the rad are hot?

 

[captnkirk]

Thanks John, bleed valve side measures lower than the cold side so the radiator is on a bit wonky, bleeding just water how about I get a a bleed valve put on the high side?

 

[JohnD]

if you are lucky, in the opposite end of the rad is a plug with a hexagonal socket, or the head of a bolt. Either of these can be unscrewed (with the rad valves tuned off at each end) and a new plug screwed in, which incorporates a bleed screw. The new plug should have PTFE tape wrapped round the thread to prevent leaks.

http://www.screwfix.com/p/radiator-vent-blanking-plug-chrome-bsp/40972?_requestid=2192917