Question about Whirlpool AD40U Humidifier

1 Answer

Does not dehumidify

My dehumidifier has "very warm air" blowing out of the back, the front gets very cold, almost frosty, like it is supposed to, room is 70 degress, just cleaned it out today, no water....

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  • amakrepairs May 20, 2009

    we normally get water in our basement when it rains real heavy, which is why we use it. The dial/switch auto checks humidity levels and turns unit off when dialed down... you explained it exactly like I explained to my wife as I was cleaning the unit. normally we have to empty unit almos twice a day when we use it. can't figure this one out.

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Hello. I am here to help. Let me begin by saying that a dehumidifier only needs to be operated if the humidity in your home is too high. If the humidity is low, the humidifier will have to work really hard to try and remove water from it.

Here is an overview of how the dehumidifier is supposed to work:

When the unit runs, the circulating fan and compressor also run. The fan continually draws room air over the evaporator coils, which are cold, and then over the condenser coils, which are warm. Because the evaporator coils are cold, the moisture in the room collects on them--just as the outside of a glass of icy liquid "sweats" on a warm, humid day. When the moisture on the coils increases, it drips off of the coils into the collection container.

The air then flows over the warm condenser coils and out into the room. This process removes water from the air and, because of the heat from the fan motor and compressor motor, the exiting air is somewhat warmer, as well as dryer.

Posted on May 20, 2009

  • Joe Hogan May 20, 2009

    If your dehumidifier doesn't seem to run often but the humidity in the room is high, try adjusting the humidistat control on the dehumidifier to a dryer setting. If the dehumidifier seems to run constantly, but there's little or no water in the container, there may be a problem in the refrigeration system. Try cleaning the unit. If that doesn't work, you can't repair the refrigeration system yourself, you need a qualified appliance repair technician to do that.

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