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Posted by Gerald on November 12, 2003 at 11:02:26:
We have an old (1908) three storey house with hot water rad heating. Last winter the old furnace/boiler and circulating pump was replaced. The heat now on the 1st/2nd floors is good and when the thermostat is turned up a lot of heat comes off the rads. The rads in the two third floor bedrooms are barely working. A week ago I turned up the heat and able to get some heat out of the rads but it was pretty weak. I tried bleeding the rads and was able to get some air out of one of them but got nothing out of the second one, not even a dribble of water. There are two pipes going into one end of the base of each rad and the pipes themselves feel somewhat warm but the rads are stone cold at the opposite end by the bleed valve.
Any suggestions? Could they be blocked? The first couple of fins on the rad at the end close to the pipes feels warm but at least 2/3rds of the rad is cold.
Thanks for any advice!