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Sorry about the grammar. Sound from the pump was just the water flowing. When I bled the radiators, no water or air was coming out so using the 'filling loop' which was in the attic; released more water into the system. I was then able to bleed the radiators properly. When I went to...

Was wondering if anyone can help? I recently had an air-lock in my heating system so followed some advice on here on how to resolve this issue; drained system, refilled system (filling loop), checked expansion vessel pressure and bled radiators etc. I seem to have no heating at all now and...