"The Medway Handyman" wrote in message
...
I've got a customer who owns a house divided into 6 x 1 bed flats. The
top floor flat rad is completely cold. Water comes out of the bleed as
usual. The occupants of the other 5 rooms are all complaining that their
rads get far too hot.

All the rads seem to have a lockshield on both ends, so can't be adjusted.
Why would that be?

I could only check the rad in the flat below the top one, which was red
hot, both valve fully open.

Combi boiler pressure was down a little & output set at 56 degrees (LED
display).

I reckon the problem is the lack of adjustment on each rad, poor bugger on
the top floor is loosing his share of heat to the over hot other 5.



So adjust them with an adjustable wrench to prove this. Turn some rads on
the lower floors down to see if you can kick start the top floor.

Adam