Hi recently drained central heating system to add radiator. Refilled - bled rads, pump and various vents in airing cuboard.
Fired boiler but after a minute there was a banging sound from boiler/flow return pipes? then overheat light comes on and boiler cuts out. Heat seems to go partially up the flow (few meters).
Thinking airlock but tried draining and refilling twice already and no joy!
Any help would be greatly appreciated thanks
Fired boiler but after a minute there was a banging sound from boiler/flow return pipes? then overheat light comes on and boiler cuts out. Heat seems to go partially up the flow (few meters).
Thinking airlock but tried draining and refilling twice already and no joy!
Any help would be greatly appreciated thanks