Rad prob's.

[meatpie48]

I have a rad in my bathroom that doesn't work. I have drained, flushed, replaced valves, bled & balanced but still no joy.

When I bleeed, the Flow pipe gets hot. If I take the bleed off then water (hot) pours out. As soon as it is replaced/shut the hot starts to cool down & within 5 minutes is stone cold.

The return has about 4 90deg bends in short succession before it disappears into the back of the airing cupboard, when it can just have a single 90 to do the same job.

Is a blocked return causing this problem and will replacing the pipework solve it?

Many thanks

 

[gigz]

Has it ever worked ? Take the rad off and open both valves into a bucket to see if you have good flow, if you do they could be piped wrong (both to flow/return) or if you've fitted a trv make sure its on the right pipe or is bi-directional.