One cold radiator

Postby Den » Sun Oct 28, 2007 12:39 pm

We have one cold radiator in a central heating system with a primatic cylinder (no header tank). We have flushed the radiator - worked for a short while. The radiator is cold even though the incoming pipe is hot. With left hand valve shut and right hand valve open, opening bleeding valve still produces water pressure and vice-versa. It has been suggested that we completely drain the system to remove any existing buildup of detritus. The radiator affected is furthest from the pump. Boiler has been kettling and Fernox additives have been successfully used via one of the radiators

Any suggestions will be gratefully received - we are looking forward to a warm room for our Christmas dinner (LOL).
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sun Oct 28, 2007 12:28 pm


Simply Build It

Postby htg engineer » Sun Oct 28, 2007 6:01 pm

Why/when did this happen, has it just happened or have you had the radiator removed for decorating ?

Check both valbes are open and try turning the other radiators off and see if this one heats up, check the pump setting and turn it up if possible.
htg engineer
Rank: Project Manager
Posts: 3224
Joined: Tue May 22, 2007 5:22 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