drain some water out of the radiator system via a hose pipe connected to the drain valve usally found at the pipe work at bottom of rads
floyche
December 2009
check the filler loop is not letting past, then bleed some water out through the air bleed screw on a rad, will need a old towel and a small container to catch the water stop at about 1 to 1.5 bars cold pressure .
wirecutterman
November 2009
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.