Unidirectional TRV fitted wrong way round - still working?

[WLF85]

I've been slowly upgrading my radiators room by room and thus far all of my radiators have had the TRV on the left.

I therefore assumed that the latest room would be the same. The radiator heats up perfectly.

However, I noticed today that the pipe I thought was the return is heating up a lot quicker than the other one. It seems that the pipes in this room are the other way around.

The documentation for the TRV clearly states unidirectional and that the TRV must be placed on the flow.

It's not making any noise or heating up differently to the other rads.

Should I just leave it?

I dont fancy draining down to solve this if its lot causing any knock on effect that I haven't considered.

Thanks a lot for your advice.

 

[Nige F]

At this time of year, just leave it . It won't give the same accuracy of control as it should, but if it works ..... change it in the summer.

 

[JohnD]

you might find it closes with a clonk as the room reaches temperature