Radiator not heating

Hi all,
A couple of my rads will not heat up properly. I tried bleeding them but only a tiny bit of air comes out and nothing else. Water doesn't even come out after bit of air is removed. All other rads are fine. I have oil heating.

Any ideas?

Thanks a mill!

Jac

Check that the valves at the bottom of both ends are open. Anticlockwise = open

Hi.
Are the problem rads upstairs or down. If upstairs rads are the problem have a look in the attic and check that the "make up" tank is full , if not it should be . This is a small tank usually positioned above the main water tank in what is called an " open " heating system and is filled via a ballcock valve which might be stuck blocked or frozen..
If you dont have this tank then you have a" closed system" and will try to help about this if investigation of tank fails.
W200