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...