Cold Downstairs Rad

[TORMULA]

I have one downstairs rad that I cant get hot.

The pipe leading in gets very hot but at best the rad only gets warm. I've flushed the rad and there wasnt too much muck.

I've recently moved the rad but it had the same problem before I moved it. Its been moved previously when the old owners of the house had a wall moved.

The rest of the pipework to the other rads is microbore and this rad has 15mm could this be an issue?

At the moment both valves are fully open, if I close the LSV down to 1/2 to 1 turn open the rad gets cold.

The pipework goes from this rad back up to the first floor. I've recently replaced the pump and its on full.

I'm having other problems and I dont know if this is related. See my other posts.

 

[payney1974]

If its the ony rad on that pipe drop it could be an airlock depending on how its piped up under the floorboards, a blockage or a boiler thats not up to the job. Try puttiing your heating on full with hot water off and turning every other rad off in the house, see if that pushs the airlock away (vent rads after) if that doesnt work try turniing the bypass off aswell.

 

[migoplumber]

payney is on the ball.

 

[REDSAW]

are the valvess blocked?