I have just installed a new radiator to my system from a worcester bosch greenstar junior now the upstairs radiators wont work, the pump seems to be working,the pipes get warm to a low height, is this is an airlock could anybody shed any light on this?
if so, close all the rads off besides the cold ones, one at a time if there is an airlock the pressure will push it into the rad, then bleed as you are doing.
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