the Radiator (normal Stelrad - nothing fancy) is hot at the top and cold at the bottom, the inlet side pipe is red hot, the outlet side is cool. All the other radiators in the house are OK - this one is in the middle of the system and the radiators before and after it are OK. We've been told a system flush should solve the problem.

Could it be a knackered radiator with an internal blockage or a blockage in the outlet pipe and how might I prove/disprove that?

thanks.

Michael Hartley, January 2009

thanks Tony - I'll try that (when the weather improves !) I was expecting to have to do a full system flush - but this sounds much less expensive.

Michael, January 2009

shut this rad down ,remove and flush it out in the garden.open valves a bit if water runs freely it should be ok.refit and bleed until hot , remember to refil the system.

TONY M., January 2009