Cold radiator. Microbore pipework in system

[stevenhenry145]

Hello all, have 1 radiator in my living room that is not heating up. I have microbore pipework I have taken the radiator off and flushed it with a hose ut still it is cold As the weather is getting colder now I have my heating on in the early mornings, and will do so more now the months go by. What could the fault be? Thank you for any help offered

 

[D_Hailsham]

Turn off all other rads and see if the living room rad heats up.

If it does, the system needs balancing.

If it doesn't, there is a blockage in the pipes to that rad or in the rad itself.

Microbore has a reputation for blocking up. Usually caused by insufficient inhibitor in the system.

 

[stevenhenry145]

Hi, thank you for helping me

The rad was ok before, all of a sudden has been blocked up.... not a balancing problem

How can I remedy this? I flushed the rad through but still cold

 

[Whitespirit66]

Have you got thermostatic radiator valves? If yes, remove the TRV head, and check that the pin isn't stuck down.

 

[stevenhenry145]

Pin is ok have checked that, it moves up and down (with pliers) quite well

 

[D_Hailsham]

Pin is ok have checked that, it moves up and down (with pliers) quite well

When the pin is pushed down it should spring back up when you release it. You shouldn't need to use pliers to pull the pin up.