I was thinking air lock as I did have blockage on downstairs radiators which seemed to improve when system was left to settle for a few days and then air released through air vent by cylinder.
If it is an airlock in the boiler how can it be released.
Appreciate all comments about...
Central heating system was blocked . Has now been flushed out, pump replaced and motorised valve replaced.
All radiators now heating up and hot water, but boiler cutting out and firing up again every 20 seconds.
:cry: please help.
Serious money already paid out to plumber who diagnosed a blockage in central heating. WE had already changed pump and motorised valve.
Pressurised wash carried pout by plumber and blockage cut out of pipe near boiler. The CH system worked ok for a few days and now the...