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Thread: Wall Window A/C Condensation Doesn't Drain

  1. #1

    Default Wall Window A/C Condensation Doesn't Drain

    I'm not sure if this is the right forum to post this, but I've had luck here before so here goes: my wall air conditioner does not drain the condensation at all. Somehow it got clogged. It's a small unit, Maytag/Fedders m6x06f2a, and only cools our 10x12 room. Any general ideas on how to "unclog" it? Thank you.
    Last edited by nin28; 08-10-2009 at 05:06 PM.
    I'm NOT a plumber, I just play one at home.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
    New England


    Lint/dust/pollen build up and need to be cleaned out. Have you checked the owner's manual? If you don't have it, you can probably find it online. It probably shows how to take the cover off and get to the drain.

    Sometimes, the drain line gets kinked. You need to check it out to verify. There is a sloped pan underneath the evaporator coil to collect the condensation. At the low point, is the drain hole.Sometimes a pipe cleaner or a wire or something can be used to poke through it and clear out whatever is plugging it.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Plumbing Designer FloridaOrange's Avatar
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    Dec 2005
    SW Florida


    If you have one try to Shop-vac it.
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  4. #4
    Plumber jimbo's Avatar
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    Aug 2004
    San Diego


    It needs to tip slightly to the outside, and if there is a drain hole or slot, clean it out.

    You probably already know that Fedders, who made window A/C under their name and the Maytag brand label, is Chapter "gone" bankrupt. No warranty or service or parts are available. Just run that sucker until it dies!

  5. #5
    Extreme DIY Homeowner Scuba_Dave's Avatar
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    Jan 2009
    South of Boston, MA


    My friends AC did not have any drainage hole
    We had to drill one
    DIY Handyman (not 4 hire)
    I have enough to do to my own house

  6. #6


    I'm looking all over the place for the drainage hole and I don't see a thing. I think it may be an issue with the A/C not properly tipped to outsite. The window sill on the outside of the house is actually higher than the inside causing the A/C to tip inward. I used my carpentry skills to get the A/C to tip outward and it seems to be better. So much water collected in the pan that I could hear the fan going through it. I may still take it apart and see if I can figure out what is going on. BTW, couldn't find a manual online anywhere. Thanks for the help.
    I'm NOT a plumber, I just play one at home.

  7. #7
    Engineer Furd's Avatar
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    Jul 2007
    Wet side of Washington State


    I don't know about your particular unit but many window A/C units are designed to hold a certain level of water in their pan and the fan does indeed dip into the water. The fan then throws the water onto the condenser coil which helps to cool the condenser (by evaporation) and this can often result in no water being drained.

  8. #8


    That may be the case Furd cuz I can't find a drain anywhere. Now that the A/C is properly tipped towards outside it doesn't sound like the fan is "drowing" in the water but is hitting it. Also, last year, water would drain into the window sill, which it is not doing now. Thanks for everyone's help.
    I'm NOT a plumber, I just play one at home.

  9. #9
    DIY Junior Member Sal Castro's Avatar
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    Jul 2011
    Elmont, NY

    Default Fedders Large Wall A/C Drain problem

    I found a 2007 model large wall unit with a drain design problem. Drains were all clear but this unit with its powerful blower sucked up the water from the drain pan and blew it into the room. Standing in front was like taking a shower. We designed a drift eliminator by covering the lower section of the coil and drain pan and keeping that section isolated from the fan's negative return air pull. Works great. All water flows outside now.

    Sal Castro, P.E.

  10. #10


    Is the AC cooling good? Is water dripping inside? As long as the AC is cooling ok and there is no water dripping inside your likely ok. Modern ACs to not usually drip like the old ones. Like a previous post in this thread the fan slings the water onto the back coil where it evaporates helping the cooling efficiency of the AC. If you haven't cleaned your AC in a few years better get that done before you burn out the compressor from thermal overload.And if you want to buy a new AC drill a drain hole. Hit the condenser line blow the freon charge. Then look surprised when you take it to a repairman like me and I tell you $200 to repair the line and recharge your AC

  11. #11
    DIYer, not in the trades LLigetfa's Avatar
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    Feb 2011
    NW Ontario, Canada


    I would hope that after two years, the OP would have this sorted.

  12. #12
    Jack of all trades DonL's Avatar
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    Mar 2011
    Houston, TX


    I think this is an old thread, But the way furd explained was correct.

    The fan slinger should be putting the water Outside. If it does not then the unit needs to be leveled.

    Last edited by DonL; 07-18-2011 at 11:23 AM.
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