I've recently drained our central heating system to move a radiator. It's a Vokera combi boiler. I moved the radiator and re-filled the system as normal. Now when the heating starts or the hot water comes on, the boiler makes a short banging/gurgling noise and then runs as normal. The temp gauge reading is also much higher (when the system isn't running). The noise sounds like air trapped in the boiler. But I've drained the system many times before and never had the same problem. There is a screw at the top of the boiler that says 'Air'. Does the problem sound like air trapped? If so, do I just bleed the screw like you bleed the radiators?
Thanks in advance.
Thanks in advance.