Question about Maytag M7DH65B2A Dehumidifier

1 Answer

Running but not collecting water...

Our Maytag M7DH65B2A was working fine one day and the next and forevermore has not been collecting water. When on, the fan runs and I hear a relay click on and the lights dim about every 15 seconds. I've opened up the unit and checked connections and all of the sensors and nothing "looks bad" but after reassembling, it continues the same behavior, of running, seemingly applying the compressor, and yet leaving a bone-dry water bucket. Any advice as to how to narrow the fault to one of the 3 sensors - humidity, heat, and defrost? I have the same problem. I took out the air filter and looked at the coil, it was all iced up. Upon further investigation I discovered that there is a sensor on the fron coil that is held in place, against the coil in a metal clip. The clip had rusted away and the sensor was all afloat. After defrosting the coil I was able to slide the sensor between the foam insulation and the coil. The insulation holds the sensor tight to the coil. We'll see what happens.

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  • Anonymous Aug 01, 2008

    I have a simplicity compact dehumidifier purchased at Canadian Tire. in 2006. It worked at the first of the season but the last week it runs but no water is collected. I checked to make sure the float was right and there is not extention being used. Good air circulation and I did clean the filter and brushed any dust from the coils. There is not place handy for me to take it for repairs although it is still under warrenty.

  • Anonymous Sep 13, 2008

    Did your fix work??

  • JERRYDIN1 Oct 04, 2008

    PROBLEM I'TS BEEN RUNNING BUT NOT COLLECTING ANY WATER AT ALL, I CLEAN THE COIL INSPECT EVERY PARTS , AND CLEAN THE FILTER IT IS THE SAME RESULT

  • pcoggesh Oct 05, 2008

    Same problem. Runs constantly but has recently stopped collecting any water.

  • rmahan Mar 11, 2009

    I have a Simplicity 20 dehumidifier, runs constantly but does not collect any water.

  • Anonymous Apr 30, 2009

    the front coils of the dehumidifier are icing up. I've noticed that the sensor which was attached with a metal clip, the clip has rotted and the sensor has fallen off. Would this cause the icing and if so where can I place the sensor to correct the problem?

  • Mr Briceman May 11, 2009

    Yea same thing, I am getting a tickle of water but nothing like I used to.

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Dehumidifiers have only a few components, and operate on the same principle as a refrigerator, freezer, or air-conditioner.
Components Residential dehumidifiers have a cooling system made up of these primary components:

  • The compressor is the quiet motor (engine) of the cooling system. It's the black, football-size component at the bottom of your dehumidifier. The compressor runs as long as the dehumidifier humidistat (the humidity-sensor) calls for a reduction in the humidity.

  • The condenser is a series of finned tubes, similar to a radiator. It's usually near the circulating fan.

  • The evaporator is located near the back of the dehumidifier, right above the water-collection container. It also resembles a radiator or a coiled-up set of tubes. When the dehumidifier's humidistat senses increased humidity, it cycles on, which starts the compressor and circulating fan.

  • The circulating fan circulates the air over the evaporator and condenser coils.

Principle 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 Jul 29, 2008

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There are many reasons why a dehumidifier will not work or collect water.


Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier

Dehumidifier is running but no water is in bucket

heatman101

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Hi,
There are many reasons why a dehumidifier willnot work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrongwith their dehumidifier

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////..

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Hi,
There are many reasons why a dehumidifier willnot work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrongwith their dehumidifier

Dehumidifier is running but no water is in bucket

heatman101


,,..,,

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Running but not collecting water...


Sorry to be vague in advance. I am a bit confused as to the compressor seems to be running bit. If the unit is on you should hear the compressor making a continuous noise. What you have described over a relay going click every fifteen secs could be the compressor overload / relay. If it is then the compressor is trying to start hence the dimming lights. Either way I would suggest one of two scenarios either the compressor is faulty or cannot start due to the relay or the unit is short of gas. Eiher way not a good scenario. I would suggest a tech to confirm or spend the money towards a new unit. Hope this helps.

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