Noisy thermostatic radiator valves..

[TyLore]

In the summer I installed TRV`s to a couple of radiators, Now the cold weather is starting to kick in I`m starting to have problems.

When the room reaches the set temperature the Valves start making very loud clicking noises - and the radiators stay cold. Before I fit them I ensured that they where attached to the supply pipe so I know that isn`t the problem and if I turn them manually the water is released into the radiator ok.

Any ideas?

 

[ChrisR]

"When the room reaches the set temperature the .....- and the radiators stay cold."

I don't think you meant that?
Heads aren't horizontal are they?
Certainly sounds like they're in backwards. Most are bi-directional these days. What make? Is there an arrow on the side?
Do they just go click once or do they judder?

 

[COG]

check your TRVs they should have an arrow pointing in the direction of flow (hot to cold), bi directional will have two arrows usually

 

[TyLore]

"When the room reaches the set temperature the .....- and the radiators stay cold."

when the room becomes cold enough for the TRV`s to kick in, instead of releasing water into the radiator they don`t and just start juddering as you put it, sorry if I wasn`t clear enough.
There is an arrow on the main body pointing towards the radiator, so I guess it`s one way - but before installation I checked that opening the existing valve released water into the radiator, as the other side did not, I assumed this was the supply.. am I right?

 

[TyLore]

Actually just checked again... they are on the wrong side...

oops, I`ll get me coat!

cheers guys