radiators wont heat down stairs?

If it's not airlocked then it's probably the pump. If pump isn't running the hot water in system will gravitate upstairs and starve the radiators at lower levels.

Steve
March 2007

air lock in pipe work shut all rads upstairs put heating on full that will push air lock out of flow & returns to downstars. remember how many turns to shut each rad so you can set them back & not unbalance system. when flow to downstairs is ok open rads again and turn off system and rebleed.

hi-spec plumbing
March 2007

Have you checked pump is working? and are electronic valves are open.

chris
March 2007