stone cold rad

keyboard

Hi all

another update on my rad saga. I have bled the rad in question and nice clean water dribbles out..... i have also sprayted wd40 on the trv pin and still the pin doesnt want to co operate. Therefore, can i safely be led to believe that a new trv would cure the problem.

Also a rad in the living room that was working has decided to stop working..... i bled that rad too and also nice clean water came out, this rad gets lukewarm after a long time... byt the time this gets lunkewarm all the other rads are boiling....

Another thing i tried was to close this valve on all the upstairs rads to force the water downstairs where the trouble rads are.

This is valve i closed..

http://homepage.ntlworld.com/unixhome/plumbing/DSCF0425.JPG

Any advice please

System

thanks op the answers you got sorted my cold rad out a treat ! a swift smack with a hammer made the pin pop up.