Question about Maytag M7DH45B2A Dehumidifier

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Indicates full when empty

We just moved into a house with a M7DH45B2A in the basement. It blinks 'full' when it's empty, won't turn off without unplugging and is, consequently, non-functional. ?????

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  • Anonymous Jul 07, 2008

    Indicates full when empty

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Hi, There should be a little actuating rod poking down from the roof of the bucket chamber which contacts the bucket-float at one end and a microswitch at the other.

Check this if you can to see whether it is present, absent, lying on the floor or just plain stuck.

If these suggestions do help you solve the problem, please give my reply a rating to help others judge my knowledge / guessing skills.
If they do not, please hold off on the rating and add a comment with more details so I can try to help you further. Cheers, D

Posted on Jul 13, 2008

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Here is a tip that explains what can be happening to make the dehumidifier show that the bucket is full when it is not.

Dehumidifier Problem It shows Bucket Full

heatman101

Aug 25, 2010 | Maytag M7DH45B2A Dehumidifier

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Maytag Dehumidifier will not run. Indicator light says "full"


Hi,
Here is a tip that I wrote to help people with just that dehumidifier2_bing.gif problem..

Dehumidifier Problem It shows Bucket Full
http://www.fixya.com/support/r4688381-dehumidifier_problem_shows_bucket_full

heatman101

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I plug in and it full light blinks..it is empty.


your tank is not sitting flat on the floor of your machine

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Check the float first - be sure the styrofoam on the bottom is still intact.  Be sure that you can move it up and down freely (and easily) with the bucket out of the machine.  If that is not bound up, and the foam is in place, next check the switch in the dehumidifier itself.  It's directly behind where the float goes - the way to test it is to turn the dehumidifier on and push the metal tab in with your finger.  The machine should cut out immediately - if it does not - the microswitch needs to be replaced.  (they're very cheap, and simple to replace)

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Heats up basement


Dehumidifiers and how they work
Heat pump dehumidifiers

Dehumidifiers use a heat pump (similar to an air conditioner's heat pump) or chemical adsorbents to remove moisture from the air without cooling the air.

A heat pump dehumidifier uses a fan to draw indoor air over a heat exchange coil. The coil is almost freezing. The water in the air condenses on the coil and is drained. A second heat exchange coil reheats the air, which the dehumidifier exhausts into the room.

A heat pump dehumidifier dumps heat lost from the compressor and fan motors into the air. It returns to the indoor air the heat generated by the dehumidifier turning water vapour to liquid. I got this off the internet

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