Stone cold radiator panel.

[jojo]

I need some help on how to fix one of my radiator panels that's just gone stone cold, but all the others in the house are hot! I have checked the valve/taps are wide open, and it's pressurised full of water!

Cut a long story, all radiators upstairs didn't seem too hot over winter, so I bled all of my upstair radiators and was surprised with the amount of air I got in all of them! I bled it to the point there was no longer pressure in the system, and the combi boiler switched itself off. So I repressured it back to 1bar and fired it back up, and everything was working as normal as you would expect. This was about 2 weeks ago.

I did notice the landing was a bit colder than normal, but I just thought with it being so cold outside, it's just natural for that part of the house to be cooler, but the missus noticed today the actual radiator was stone cold.

With the pipes inside the walls, I can't see how they run, but I suspect I've got some kind of air lock in the system? Would closing the valves of all the working radiators, but leaving the cold one open, so forcing the water to go through it work?

I've never had this issue in 15 years living here, and I've definitely not disturbed said radiator, prior to it going cold.

 

[desertstorm]

When you bleed the radiators the heating should be off, Ie the pump not pumping. You can get a build up of sludge in the system especially if the corrosion inhibitor has lost it's effectiveness or been diluted due to the system being drained.
http://www.screwfix.com/c/heating-plumbing/inhibitor-protector/cat831474
Closing down all the other rads will force the water through the cold rad will hopefully resolve the issue.
http://wiki.diyfaq.org.uk/index.php?title=Central_heating_design
The rads are usually all connected in parallel on an upstairs and downstairs circuit.

 

[jojo]

When you bleed the radiators the heating should be off, Ie the pump not pumping. You can get a build up of sludge in the system especially if the corrosion inhibitor has lost it's effectiveness or been diluted due to the system being drained.
http://www.screwfix.com/c/heating-plumbing/inhibitor-protector/cat831474
Closing down all the other rads will force the water through the cold rad will hopefully resolve the issue.
http://wiki.diyfaq.org.uk/index.php?title=Central_heating_design
The rads are usually all connected in parallel on an upstairs and downstairs circuit.

Cheers Karl, I'll try closing off the others and see what happens? Didn't know about bleeding the system whilst it's off though, didn't think it would make a difference? Combi has been installed just under 2 years and fresh corrosion inhibitors was put in at the time, so hopefully, not much crap in the system.

 

[newbster]

do you have a TRV on the affected radiator, they can sometimes stick closed
/m

 

[Nilz]

Try switching all the other rads off @jojo and then leave the cold one on so it forces the pressure into that one and see if it warms it up, once it does, then release any air and then switch the others back on.

If that doesnt work, let me know, I could probably get one of the lads from the office here to pop over and have a look for you.

 

[jojo]

do you have a TRV on the affected radiator, they can sometimes stick closed
/m

No TRVs on my rads, but I really should consider sticking some on.

Try switching all the other rads off @jojo and then leave the cold one on so it forces the pressure into that one and see if it warms it up, once it does, then release any air and then switch the others back on.

If that doesnt work, let me know, I could probably get one of the lads from the office here to pop over and have a look for you.

Cheers mate, not got round to doing it this morning, will give it a bash tomorrow.