changed indirect cylinder only4 out of 7 rads downstairs will heat up lot of air in rads upstairs cant seem to get rid of it tried heating up system turning of & bleeding several times air coming out but still some remains any ideas thankyou

peter parker, March 2007

you must keep bleeding & get all air out, and check small tank in loft is still full of water & float valve ain't stuck shut.

hi-spec plumbing, March 2007