Is this TRV faulty and can it be repaired?

[pappyon]

On a central heating system which is seven years old there is a TRV fitted to a bedroom radiator and even when it is turned off the radiator still gets as warm as though the TRV setting was at maximum.

I think it is a good make as the system was installed by Scottish (British) Gas.

 

[ChrisR]

No the wax/liquid in the head will have "gone" or a bit's dropped out, or the valve seat's leaking...

You can't easily buy heads alone but if you buy an identical whole valve you could try just the head. Saves getting wet.

 

[pappyon]

Your prompt reply to my post is much appreciated.

Luckily we have a Scottish Gas maintenance contract which I have just discovered covers this eventuality.

Have just phoned them up and an engineer will be out tomorrow morning.

Thank you for your time.