Radiator not working properly

[Sam28]

Hi Everyone

I recently had 2 new radiators installed in my house, one in the bedroom & one in the en-suite on the 2nd floor both with trv's (think thats what they are called) radiator in the bathroom works fine but the one in the bedroom begins to warm up then stops. Just wondering what might be the problem? Ive tried bleeding the faulty radiator but with no success.

Appreciate any help....

 

[migoplumber]

hopefully air lock, shut all other rads, dodgy rad should work fine.
then the "new" system will require balancing with the lockshield valves your installer should of done this, call him back