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Posted by dee on February 13, 2007 at 14:07:37:
Hi,
We have an old steam boiler. The radiator in one of the upstairs bedrooms doesn't heat-- when you first turn the heat on (or raise the temp) it briefly heats up and then stops and remains cold. We've changed the can and checked that the valve is open (it is a one pipe system). What else should we do?