Just wondering if anyone coukd help. My boiler is seemingly working and has recently been fitted with a new pump. The hot water works fine. However when I put the central heating on only the radiators in the hall and bathroom (physically closet to the boiler) hea tup. The others are stone cold, although the pipe to one radiator in the bedroom warms slightly. I have bled the radiators so no problem there.
Any suggestions as to what the problem might be, and possible solutions would be much appreciated.