Question about Maytag M3DH30B2A Dehumidifier

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Compressor not working

Our compressor was not working so I looked on your website for hints and we did a few of them. Finally we uncovered the defrost switch from the black putty and tapped it a few times and the compressor began to work. We put it all back together and of course it won't work now. Any suggestions?

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  • Anonymous Apr 12, 2008

    It keeps running, but no water is collected.

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1 Answer

I got it!
Just put the defrost switch away. Maybe it's out of order, and reports a wrong temperature. Or go to get a new one.

Posted on Apr 13, 2008

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Posted on Jan 02, 2017

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My amcor dehumidifier tc120 has started clicking recently and now its out put is poor the unit is used in a cellar just to keep control of humidity it works 24/7 then has few days off when full untill i...


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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Unit keeps trying to run, but stops, then trys again. this happens 2 or 3 times until unit finally starts.


Hi, The compressor is taking a few tries to start...the capacitor is probably bad...this does not give the compressor the kick it needs to get started...
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

Sep 28, 2010 | Haier 45-Pint Dehumidifier

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My Santa Fe RX runs for about 1/2 hr. The accumulator gets cold and than warm. Compressor & fan run. Humidity is set to max. No water is ever collected (I monitor the pump reservoir).I have removed the...


Are you keeping all of the metal covers in place while the machine is running? If you remove some of the metal covers, the fan may not move the air through the dehumidifier as intended.

If the compressor runs (with all of the metal covers in place) and the accumulator does not become cold, there are a few things that may be affecting your dehumidifier.

1. low refrigerant charge - you may have a refrigerant leak.
2. blocked capillary tube or broken expansion valve.
3. blocked air filter prevents enough air from moving through the dehumidifier.

Good Luck - DryDog

Aug 15, 2010 | Santa Fe Dehumidifiers

1 Answer

The compressor runs, but the fan doesnt work when we trouble shooted it. we found out it has power when we bypassed the switch and tested it. we pulled out the control box and it doesnt look like anything...


Hi, after reading you're problem, I found that you did the right thing.If you bypassed the switch and now you have power to the condenser motor but it doesn't operate, the motor is faulty, as you are eliminating the switch sending power to the fan motor. If you have power going into one side of the switch and you jumped it over, and the motor starts, the switch is at fault. So, you did the right thing! Sometimes you cant tell by looking at the switch wiring to no if it is at fault.In the field, we use jumper wires everyday to bypass components to check them out.In you're situation, both the compressor and condenser fan motor operate from this same switch, and the compressor was running. So, that tells me without having to bypass it that the fan motor is the faulty one, or the compressor would also be off. You may have to find one at a appliance parts house, or order one online. Sounds to me that you will have no problem changing this out. Best of luck to you, and Sincerely,
Shastalaker7
PS Let me no the out come.

Dec 07, 2009 | Kenmore 54351 Dehumidifier

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I am having Daewoo refrigerator Model DIR220. When I switch on the refrigerator the compressor starts after about 3minuites and stops in few seconds. fan motor works continuously. As the compressor stops...


the compressor has an internal overload to protect it from overheating. the compressor is cooled by the refrigerant passing over it. It could be a bad compressor,, bad charge of refrigerant, or simply dirty coils not allowing air movement

Nov 26, 2009 | Dehumidifiers

1 Answer

Compressor will not kick on. Installed new circuit board and the compressor still won't work. The compressor does work when it is jumped.


If the fan runs, the only thing left in your case looks like the defrost control. Sorry I don't have my user ID and password for their service site here at home. I can look up a part number for you tomorrow if you'd like.

Sep 18, 2008 | Comfort-Aire BHD-301 Dehumidifier

1 Answer

Running but not collecting water...


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.

Jul 29, 2008 | Maytag M7DH65B2A Dehumidifier

3 Answers

Dehumidifier Freezing up


Based on the information provided above, I am unable to provide a positive solution to your issue. I have provided some common solutions to help guide you in your search.


This link, http://www.repairclinic.com/SmartSearch/SmartSearch.aspx, provides exploded view imagery, belt routing diagrams, parts imagery and function, parts ordering and shipping information, error code details, just about anything you need to get your appliance up and running again. Just follow the links to navigate through the site.

You will need to enter the model number stamped on the manufacturers product information data tag, located on the unit, and not in the User’s Manual. to access your product information.


Clicking on the underlined links will take you directly to that page.


Note: A volt-ohm meter is beneficial in performing electrical tests.

Some models utilize a defrost thermostat that simply switches the compressor off and on. This can be replaced by unsnapping it from the condensor coil.

Another type uses a defrost control kit to cycle the compressor and is a little more involved in the replacement.
See Item #
878674 by clicking the link below

http://www.repairclinic.com/SmartSearch/SSPartDetail.aspx?PartID=878674&PPStack=1

If my assistance helped resolve this issue, please show your appreciation by rating how effective my advice was in resolving this issue.
Thank you,
Dave E. (Illeagle)

"Your satisfaction is my personal reward"

Jul 11, 2008 | Dehumidifiers

1 Answer

DH30 Dehumidifier Compressor Does not Operate


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.

Aug 05, 2007 | LG DH30 GoldStar Dehumidifier

3 Answers

Compressor is not working


Try gently tapping the compressor a few times -use a wooden stick or similar to avoid damage -sometimes that is all that's needed. There are however many other possible reasons for a compressor not to start - most have their own fuse/controller assembly (sometimes this is very obvious inside the case, often a car spade type fuse which is worth checking visually), and there are cut-outs that will stop the compressor if it is low on gas, although usually it will start first for a few seconds if this is the case. Sorry, but the (www.maytagair.com) website is down at the moment, but try it again later and you should find their troubleshooting and support is good. Hope this helps :)

Mar 03, 2007 | Maytag M3DH30B2A Dehumidifier

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