TRV pipe cold. Return pipe hot. Rad hot at top, cool at bottom.

[rhubarbe]

Our kitchen rad is hot at the top but quite a bit cooler at the bottom. It was very cold at the bottom until the other day when e had a heating engineer to take off the rad and blast the inside with a hosepipe to clean out the built-up gunge.

Anyway, now we have the TRV valve and pipe below it which are lukewarm - no matter what setting we have dialled in on TRV, and the return pipe is red hot.

I have taken off the top of the TRV and the valve underneath moves in and out OK but doesn't make any difference if I press it in or leave it npressed, the pipe doesn't warm up.

Am I the numpty, or the man who fitted the rad?

 

[rhubarbe]

Is it? Right!

 

[rhubarbe]

They rather ran out of time when they were installing and commissioning the pump. Got to be midnight... Didn't fit an ECO/BOOST switch, either.

 

[ecowarm]

If not set up correctly you will not be getting the optimum effiency from the heat pump, phone mitsubishi tech line and see what they think to the install

 

[rhubarbe]

I'll have a word with the installer. I do have a good relationship with them..