Question about Maytag M7DH65B2A Dehumidifier

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Fan stays on, not dehumidifying

The fan continues to run unless it is unplugged. When it is plugged in, the fan runs, but no lights (the ones that tell the settings, etc.) are on, and it doesn't appear to be dehumidifying. When unplugged, and then plugged back in, the lights may come on for a moment, but then they go off.

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Deffective control board

Posted on May 11, 2008

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Hello Bernard, thank you for your post!
I see that you are experiencing an issue with the Frigidaire dehumidifier, FAD704DWD, compressor consistently being on. This could be a possible issue with your control panel or sensor. Since it could be any one of these underlying issues I would suggest contacting the manufacturer for further assistance. Hopefully this information is helpful to you. -Matt

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My Kenmore dehumidifier fan runs all the time & compressor kicks in & out. I the fan supposed to run continually.


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I cannot get this thing to stay on. The fan runs for about a minute then shuts off. I have tried unplugging it and plugging it back n and I have tried adjusting the percentage on the unit but it will not...


Hi,
There are many reasons why a dehumidifier willnot work or collect water.
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Dehumidifier is running but no water is in bucket

heatman101

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Plugged in, light on, don't hear fan running. What's wrong? On the previous, but same model we could hear the fan running but on the new one we bought we don't hear it.


Hi,
There are many reasons for a dehumidifier tto 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
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

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Thanks


I went back and rechecked. If the fan mode is selected, you can only set the fan at one of the three speeds. If you leave it in the fan mode, the dehumidifier will not come on.

Once the fan speed is selected, it will run at that speed in the dehumidifier mode. The fan will keep running, even when the dehumidifier (compressor) shuts down.

The only way to get it to turn off is to use the clock setting, which either selects how long it stands-by before starting , or how long it will run before going back to stand-by. DeLonghi calls it "stand-by," we would call it "off." DeLonghi calls unplugged "off."

I've never turned mine to stand-by, because it will never get my entire house down to 30% humidity (I have it where my air handler returns air to the basement). I live in the greater DC Metro area, where 75% humidity is considered extremely dry.

Apparently the normal mode of operation is fan on unless awaiting a clock start, or encountering a clock shut-down; either condition puts it into the "stand-by" mode.

Sep 02, 2008 | DeLonghi DE500 Dehumidifier

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If you have the fan icon selected, it is supposed to run continuously. If you use the mode button (not the fan button) to change to relative humidity (the water drop icon), the fan should only run with the dehumidifier.

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Fan no compressor will run


I have AD75USTO. Whirlpool  was running yesterday. Today it sound like its starting but will not boot up fan will not kick on. Does it need resetting or what. Only a year old only used for one summer?

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I just picked one up at a tag sale, seller said it worked sometimes. Seems to have the same problem as yours. I took the time to tweak all of the connections and then re-soldered the control board with no luck. I finally disconnected the humidity control and it worked fine. By disconnecting the humidity control the unit defaults to it's highest setting and you have to unplug the unit to turn it off. Conclusion so far is that the humidity control rheostat is bad.
Note: Now while running the fan runs continuously and the compressor cycles on and off every 10 to 15 minutes. This may to be normal since the unit appears to be doing its job and I'm not sure how it is supposed to run since a purchased it broken.

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