replying to Dave Plowman (News), Lucky wrote:
I though there was something wrong with my boiler just this week. Had someone
out to inspect and all I can hear them say is 'new boiler, new boiler'. After
doing some troubleshooting (and blind luck) I found my overheatining problem
had to do with the pump (in the loft) being air bound. After venting the
system from the loft (not the radiator), it has gone back to normal.

--
for full context, visit https://www.homeownershub.com/uk-diy...ng-640196-.htm