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  1. #1
    Join Date
    Jan 2001
    Posts
    201
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    Have had my downstairs unit off for about 2 weeks, since summer. Upstairs has run when necessary.

    Tonight I turned on the down unit and I could hear a loud rapid drip noise in the sink in the bathroom where the drain line connects.

    It only does this when the down unit comes on. Any thoughts? Both up and down drain via same sink.

  2. #2
    Join Date
    Apr 2004
    Location
    Bartlett, IL
    Posts
    6,619
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    Whatcha runnin the heat?

    Maybe the humidifier drain is tied into that?

  3. #3
    Join Date
    Jul 2004
    Location
    midwest
    Posts
    2,868
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    Trap may be dry.

  4. #4
    Join Date
    Jun 2005
    Posts
    178
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    is it 90% furnace and does it have humidifier on it.

  5. #5
    Join Date
    Jan 2001
    Posts
    201
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    No humidifier.

    Running AC


  6. #6
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,524
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    did this just start this year or has it been on going
    if there is no trap on the unit then you are hearing the condensate in the drain pan gurgling. if it just started it could be the filter is very dirty and causeing high static pressure in the return and pulling the air through the trap.

  7. #7
    Join Date
    Jan 2001
    Posts
    201
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    Ran fine all summer. Off for about 2 - 3 weeks. Turned ac back on tonight and hear the noise. Filters are clean.

    There is a trap.

  8. #8
    Join Date
    Jun 2005
    Posts
    178
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    where is the furnace in location to the bathroom.

  9. #9
    Join Date
    Jan 2001
    Posts
    201
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    above and over 6 feet

  10. #10
    Join Date
    Jun 2005
    Posts
    178
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    is it possible that the sink trap dried up did you try running some water in the sink.

  11. #11
    Join Date
    Jul 2004
    Location
    midwest
    Posts
    2,868
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    It should stop after it cycles a time or two.

  12. #12
    Join Date
    Jun 2005
    Posts
    178
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    after the p trap fills. i thought the same thing but the sink trap should muffle the sound i would thnk.

  13. #13
    Join Date
    Jan 2001
    Posts
    201
    Post Likes
    Ran sink. will let it run overnight and report back, thanks!

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