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Possible radiator airlock?

Posted: Sun Feb 06, 2022 8:43 pm
by omits
I have a rad in an upstairs bedroom which gurgles loudly when the heating starts. Its a bit variable and can go on a bit. The rad does get hot. An extension was added from the pipes adjacent to this rad to feed a rad in the room below although I'm not sure that is the problem.

I have bled the rad and it does release a bit of air when I do and it is the only rad in the system which collects air.

Do I have some air sitting in or near to this rad? Advice appreciated. Thanks.