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Cold return line on radiator

spacoli Member Posts: 61
I have an upstairs radiator that has hot water going to it, but the return line is cold. There is manual valve on the return and it  will open and close. I have bled it out and the radiators before and after this one are working fine.

What might be the problem, bad valve, blockage in the return line ? Can I close the valves on the other radiators to increase pressure to the other? Thanks


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