OK, so here's one that may be a surprise challenge. I know that the common answer to gurggling in the baseboard heat is to bleed the system because there is air in it, but I have bled the system well.
Here are the details: I have been perplexed for 2 years now because I set my heat to go on at 4:30 AM so the house is warm when we wake up. The heat comes on and the gurggling wakes us up. So I bled the system and no air came out. So I tried to repeat the problem at 6:00 at night and could not make it happen. Finally I tried to repeat the EXACT conditions of 4:30 AM and turned both the living room zone and the bedrooms zone on at the same time, and there it was. Gurggling like crazy. If either zone is on by itself the system gurrgles in both zones. If it is on in only one of the zones it gurggles in both areas like crazy. WHat could be the cause of this?
Here are the details: I have been perplexed for 2 years now because I set my heat to go on at 4:30 AM so the house is warm when we wake up. The heat comes on and the gurggling wakes us up. So I bled the system and no air came out. So I tried to repeat the problem at 6:00 at night and could not make it happen. Finally I tried to repeat the EXACT conditions of 4:30 AM and turned both the living room zone and the bedrooms zone on at the same time, and there it was. Gurggling like crazy. If either zone is on by itself the system gurrgles in both zones. If it is on in only one of the zones it gurggles in both areas like crazy. WHat could be the cause of this?