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the only shame is that no-one stocks the head on it's own, didn't need the pipe, but suppose i now have a spare, just in case :)

just thought I'd update you, the head in the conservatory was unfortunately a different connection, bought a new one for the bargain price of a fiver and now have a fully functional radiator..... who needs to pay out for an expensive plumber :D Thanks everyone for their help

yes the thermostat head. I'll leave it off while it's cold..... I do have a rad in a conservatory which I leave on full, will try changing them over & see if that works Thanks for all you're help..... :D

it doesn't seem to be moving... so I'm guessing I need a new cap??

yes it does, it goes cold when replacing the cap.

I've added an image of the thermostat control head....not sure if it will show, it maybe clear I'm new to all this ! there is another connection the other end, which I'm guessing is the lockshield you mentioned? I've left the cap off for now & radiator is red hot ...... [/img]

the plastic cap is whats always been on.. worked up until a few days ago....i'm wondering if i'm not quite putting it back on correctly.....i've tried several different ways :? Just trying to save paying out for a plumber..... Thanks for your help by the way [/img][/url]

yes its a TRV.... I think :lol: I've unscrewed it and removed the plastic cap & the radiator instantly heats, but within about half an hour of replacing it it goes cold again. Not sure if it helps but it's a Caleffi.

I have one cold radiator. On reading previous forums, I have removed the plastic cap and "tapped" the pin and hey presto, one hot radiator. However, when replacing the plastic cap, it goes cold again. Help please :roll:

I too have a cold radiator.... tried all of the above, and although it worked when "tapping" the valve, when I put the plastic thermostat cover back on it goes cold again.... help please :roll: