TRV how to open

[doobydoobydo]

Would anyone know how to remove the head of a British gas TRV to unstick it manually.

Thanks

[Lobster]

Doesn't it have the usual knurled finger collar at the base, which you need to turn to loosen? (Sorry if that sounds a daft question and the answer's "Duh, no", but you didn't say what the problem was).

David

[doobydoobydo]

Yes it does have that, so that is what loosens the TRV to come off, is it? Just didn't know how.Sometimes the TRV is a bit sticky ie heat to rad doesn't work unless The TRV is twisted open and shut a couple of times. It is also very stiff. Also brand new.

[Lobster]

Yes, turn the knurled ring and the whole top half should lift away (it is keyed so you can only replace it at the correct rotation).

Underneath you'll see a small steel pin protruding out from the body of the valve - you should be able to push this in (against a spring) and it will come back via the spring. Takes quite a lot of force (use a flat metal plate or similar to push it; you won't be able to use fingertip) and maybe working it in and out a few time will help? But take great care not to bend it - even slightly and you'll have stuffed it.

[Stuart]

That is what you do to remove the head ,the thermostatic part ..the part the water travels through will remain on the radiator so no need to think water will come gushing out .As someone else has said when you take the head off you will see a pin sticking out .Push it in and out a few times to loosen it .they sometimes stick. Replace the head and see if that improves things .

Stuart .pu

[manatbandq]

Really? Mine can be replaced in any position so that you can have the numbers showing no matter what orientation the actual valve is in.

MBQ

[Mathew Newton]

They're usually keyed insofar that they will only fit in one of, say, six positions - i.e. it uses a hexagonal mating face. Perhaps that's what matatbandq actually meant? Presumably this is to stop it from turning whilst either tightening it up or turning the control.

Mathew

[Lobster]

Yes, so are mine: I didn't worry about getting into all the details as it wasn't really relevant to the OP's issue

David