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ctwells
Nov 21, 2008, 09:37 PM
When I start up 2 or more zones of my radiant heating I get a whoo whoo noise over and over. Any suggestions? I have already tried bleeding the air from the system. The system has a newer bladder system expansion tank. It doesn't happen with just one zone, only when a second is activated.
hvac1000
Nov 21, 2008, 10:12 PM
How many pumps on the system?
Has the system been balanced?