1radiator not working return pipe hot only

[Gary barrington]

Hi in need of advice please . Fitted a new grundfos pump and bled system and all rads upstairs and downstairs are working apart from the small rad in at the bottom of the stairs.i have isolated all rads and closed the lockshields and turned on boiler and all I’m getting is the return pipe at the small rad getting hot not the feedpipe ....it’s cold any ideas .

 

[Riley]

Turn off valves remove rad test you have water at both valves. Is the non working end a TRV?

 

[Gary barrington]

Turn off valves remove rad test you have water at both valves. Is the non working end a TRV?

Hi the pipe to the trv is cold I have fired up the boiler turned the stat up and now another small rad in the downstairs loo is the same cold pipe work and yet the other big rads are working fine thanks

 

[Riley]

Whip the head off the trv could be the pin is stuck

 

[Riley]

id say it’ll either be trv or blockage

 

[DAVE01]

Hi in need of advice please . Fitted a new grundfos pump and bled system and all rads upstairs and downstairs are working apart from the small rad in at the bottom of the stairs.i have isolated all rads and closed the lockshields and turned on boiler and all I’m getting is the return pipe at the small rad getting hot not the feedpipe ..it’s cold any ideas .

Check To see if there is 2 flows or 2 returns has this only happened after you fitted pump could be air ? Disconect pipe that is not geting hot nock off the side that is geting hot and run the pipe into a bucket or even better a hose that is not geting hot you should see the air Hope this helps