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    Sam 1's Avatar
    Sam 1 Posts: 3, Reputation: 1
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    #1

    Jul 21, 2007, 07:52 AM
    Condensate line not draining
    I have a problem with my condensate line on my furnace. One year ago my 3/4" condensate line cracked and had to be replaced. I replaced it with a similar 3'4"pvc pipe which id piped to hang over my floor drain in my basement. I notice gurgling noise coming from the pipe. I checked with different people who were familiar with hvac and they told me I should have a trap in the line so I installed one. Although the line is below the drip pan in the furnace it would not drain and the condensate would drip out of the back of the furnace cabinet.
    I run my furnace fan all the time and the AC is in cool so it comes on whenever the thermostat calls for it. I have a feeling there is a vapor lock problem because when I pulled the front cover off the furnace while it was running water streamed out. When I put a filter in it is soaked in just a few hours.
    I have an electric furnace with an outdoor heat pump.
    Does anyone have any suggestions?
    Thank you,
    Sam
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #2

    Jul 21, 2007, 09:43 AM
    Do you have a dip or sag in the condensate line ? This would make a double trap causing an air lock, do you have a vent on the leaving side of the trap ?
    Sam 1's Avatar
    Sam 1 Posts: 3, Reputation: 1
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    #3

    Jul 21, 2007, 12:12 PM
    acetc,
    Thank you for answering my question. The line has 1 90 coming out of the furnace runs about 15" to another 90 turns down to another 90 turns left to a 90 to another 90 turns right to another 90 to the drain. I have the line coming out of the furnace on a small decline. I have removed the trap and I have no vent at all.
    Sam
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