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  1. #14
    o.k now I'm with you. I have two returns. One in front and one to the back of the house in the ceiling. Should I place cardboard in both, and also in front or behind the filter or does it matter? And also am I correct in stating that the cardboard will stop the water from accumulating inside the duct do to blocking the return warm air that mixes with the cold?

  2. #15
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    Behind the filter looks better. Yes it will stop the warm air from going into the cold ducts. An should stop the condensation problem.
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  3. #16
    Thank you. I will try. Sounds like pure genius.

  4. #17
    Also, should I leave the card board in permanently, or just I until things dry up? If I must remove how can I prevent this mishap from happening again?

  5. #18
    Being that I have two return filters. How do I determine which one is giving the heat?

  6. #19
    Join Date
    Mar 2009
    Location
    Mount Holly, NC
    Posts
    3,081
    before you put this cardboard in... is the heating system part of this ductwork? if it is do not use the cardboard, you will need another way to stop the convection.
    The TRUE highest cost system is the system not installed properly...
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    The A/C repairman

  7. #20
    Heading up to the attic to try to snap a picture

  8. #21
    Here we go.
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  9. #22
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    Ok, it also provides your heat, so you can't block the returns.
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  10. #23
    Finally found the main drain...looks like it goes down to the wall to the sewer. The secondary runs out the side of the house above a window. Could the back up be associated with why the ac pan looks corroded and dry. Also there was no water in the main line. I also noticed a corroded piece that has copper wire attached. What is that piece and what does it do.

  11. #24
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    No, just shows that the pan has had water in it in the past. Need pic of wire.
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  12. #25
    Wire pic
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  13. #26
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    I see a 3/8" liquid line.
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