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Hi guy's i have a problem with 3 Rad's on top floor they are stone cold!!!
they have always been hot and they have just stopped working!
i have tryed to take the air out of them but still no joy, any comments on what it could be.

many thanks Rav

rav741,
Bleed the radiators with the heating OFF.
Find the circulating pump and see if it has a speed control. If yes turn it up temporarily in case you have an airlock.
If you have a conventional heating system have a look in the header tank and make sure it has water in it.
If you have a sealed system check that the pressure gauge is showing at least 1 bar.
end