Why do the upstairs radiators not get hot?

Maybe you could try draining water out of the upstairs radiators, grab a radiator key and on top of the radiator there should be a slot for the key turn it but have a container ready to catch the water, do this while the CH is on, you should hear a hissing sound meaning there is no more air in the radiator. When the hissing is gone turn t6he key back, your radiators should get hot, but if they still don't then there's another fault with it and you should get it seen by a CORGI registered workman. Hope that helps.

Anonymous
January 2008

Either there is a restriction in the pipe work or the pump is not set fast enough.
Id imagine that the system is sludged up as that can cause the HW to get overly hot too

A Gas Man
September 2007