Cold or Luke Warm Radiators

Postby Exdaddy » Tue Jan 13, 2009 9:55 pm

My parents have an ageing central heating system. One of the radiators with TRVs only gets luke warm. I have taken the sensor head off, but the valve pin is stuck. I am assuming that the valve is stuck in the nearly closed position. Do I need to repalce this valve, or is it possible to repair?

A second downstairs radiator is stone cold, not even the input pipes are warm. Any ideas on this one?

Thanks very much.
Rank: Apprentice
Progress to next rank:
Posts: 14
Joined: Tue Jan 13, 2009 9:29 pm


Simply Build It

Postby swidders » Wed Jan 14, 2009 12:14 am

sounds like it needs a flushing out - buy a system cleaner from any diy store and follow the instructions.

valves are getting clogged with age - may need replacing if you can't repair them. TRVs not very expensive, so easy to replace if you are confident of replacing the tails from the radiator in question. Unlikely that you can repair it since the system sounds old and parts obsolete.
Rank: Ganger
Progress to next rank:
Posts: 90
Joined: Sat Jan 10, 2009 11:32 pm

Postby Steve the gas » Wed Jan 14, 2009 6:17 am


Trv pins need freeing up wd40 and a few light taps on valve body with hammer.
You can pull the pin up with pliers but only 2 - 3mm.

Steve the gas
Rank: Site Agent
Progress to next rank:
Posts: 780
Joined: Sun May 04, 2008 7:07 am

Postby Exdaddy » Wed Jan 14, 2009 10:01 pm

Thanks very much for your responses, I will give this a go.
Rank: Apprentice
Progress to next rank:
Posts: 14
Joined: Tue Jan 13, 2009 9:29 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!


  • Related Topics