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Posted by Tom on November 28, 2009 at 09:30:22:
Hey guys, had a new steam boiler installed last season, worked great. This past summer, I pulled out all my radiators and sandblasted/painted them and put them back. When I turned on the heat this year, some got hot, some didn't, the boiler was noisy and surging. I thought maybe I ruined the air valves by having them outside half the summer, so I replaced them. The old ones were all screwy anyway (but somehow worked): a lot of Groton "D"s, including one in the thermostat room, some adjustables. I bought all Groton's. #4 in the thermostat room, #5s on the rest of the 1st floor, #6's upstairs, and #C's in two cold, far-reaching upstairs rooms.
When I ran the system like this, it was worse. So I removed all the air valves and ran the system until each radiator got hot, then inserted the valves. There seemed to be a lot of air in the system, if that's possible. It's quieter and working slightly better now, but not great. What else can I do to get even heat?
Thanks!
Tom