Question about Heating & Cooling
Have you checked the combustion air intake pipe for plugging, possibly a bird or something has gotten in and also check the flue vent pipe for any sags or low spots where condensate can collect and partially restruct the flue gases. If you have someone start the heating cycle with the furnace completely assembled, you can check the intake from the outside where it goes through the wall. It should have a fair pull when you put your hand near it. The exhaust pipe should blow fairly well as well. Then check the pipes along the entire length, if the exhaust is partially plugged with condensate, you may hear the gurgling noise.
Posted on Nov 04, 2009
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Posted on Jan 02, 2017
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