Question about Maytag M7DH45B2A Dehumidifier

2 Answers

Dehumidifier freezing and failing to drain - Maytag M7DH45B2A Dehumidifier

Posted by on

  • 1 more comment 
  • nhkim Jul 25, 2008

    my maytag M7DH45B2A doesn't collect water anymore.

    What is the problem?

    Please let me know.

    Thanks,

    Nathan

  • rasmus2 Aug 21, 2008

    My dehumidifier was working fine --- but I noticed warm air coming out of it one day -- and a week or so later it was freezing up despite the anti-freezinag feature on the machine. Does this mean the freon is low - or gone? Is it repairable?

  • mslakisa Oct 08, 2008

    I have the same exact unit. I was told that the freon was low or that it may have leaked onto the coils.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I have a model M7DH65B2A that had the same problem.  The metal clip that holds the frost sensor to the evaporator coil had rusted clear through and the sensor was hanging in midair.  Not knowing whether I could get a replacement, I re-attached the sensor securely to 2 of the loops of the coil with nylon ties and a bit of thermal heat sink compound, available at many electronics specialty stores.  Problem solved.  You may want to get the correct parts to repair your unit, but I chose to go this route because my repair will never rust through.

Posted on May 02, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 462 Answers

It will be difficult but let me explain how to arrive at a point of investigating.
Note where and how far the frost starts to go by noting on the cold coil where the frost is and how long it takes to develop. IF it starts only after several minutes and progresses to cover the face all at once (or steady and within Id say within 1 hour the whole face) its most likely fully charged and the control is weak or bad or it could be operating in too cold of an environment to dehumidify correctly, usually the temp has to be 80'F or more for the dehumidify to work without freezing.
Also Low air flow from the circularity fan can cause the face to freeze up in this manner so run it on high speed if the temp is low to keep warmer air pulling over the coil. If your in proximity to the blower it will be cold but you have to decide on cool and damp or cold and dry.

If the temp is above this 80'F and the face freezes up and usually starts to freeze up on the refrigerant inlet end of the coil and slowly moves across the face to the other side and progresses back and forth til the whole face is covered it is most likely low charge. This can also be noted by thicker frost or ice closer to one end or maybe the bottom than at the top. and often it will not cover the whole face for a few hours.

The humidity switch (Hydrometer sensor) may be at fault or compressor or fan is not running.First You could go directly to the compressor and make sure it is or is not getting power first. If the compressor has power then the compressor is suspect (sometimes when 1 wont start it gets hot to the touch) In any case the fan(s) should run with it on and trying to dehumidify. Look at my tips and tricks for compressor check out if it has power and dosn't run..

2 KINDS of CONTROLS for your DEHUMIDIFY
If it has an electronic display the sensor will be a small probe close to the inlet of the air inlet circulation. Maybe its not in place.This type control is not something that can usually be checked without an ohm meter, thermometer, and Hydrometer or Psychometric measuring device to arrive at the wet-dry bulb temperatures thus determining the humidity and charts to determine the resistance value of the sensor(s). So replace the board and sensor on this type.

As for the drain most have a plastic pan and this is sometimes the type that has to be removed and dumped or a hose has to be attached and the hole it attaches to has to be cut out for self draining.

Posted on Apr 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

HI HAVE GOT A SWAN SH3010 DEHUMIDIFIER BUT THE COIL KEEPS FREEZING OVER WHAT AM I DOING WRONG?


Nothing.That's how it works. The coil gets cold. The moisture(water) in the air freezes to the coil. The coil then gets warm and the ice melts, dripping into the bucket or out the drain hose.

Jan 04, 2015 | Dehumidifiers

1 Answer

Why do the coils freeze on my zenith zd309 dehumidifier


Coils can freeze if the room is extremely hot. Usually, though they freeze because the path for air flow is reduced. Check input and output grilles and coils for dirt and dust and clean as necessary.

Aug 02, 2014 | Zenith zd309 30 pint dehumidifier auto...

1 Answer

Dehumidifier freezes up


Good Afternoon Friend,

I understand your Frigidaire dehumidifier, model# FDF50S, is freezing up. I see that the compressor does not shut off, causing ice to build up on the coils, rather than water draining off. What can cause this is your dehumidifier has been turned on recently. This is normal due to refrigerant rushing through the coil. Frost will usually disappear within 60 minutes. Another cause is if the room temperature is too low or too high. Your appliance is designed to operate between 41 degrees F and 96 degrees F. I suggest resetting your appliance, by either unplugging it or shutting the power off at your home's circuit breaker, for 3-5 minutes. Restore power and start any cycle. I ask that you please follow up with a comment on the post, at your convenience, to advise if further troubleshooting is needed or if your appliances status has changed successfully. Hope this is helpful.

-Best Regards-
WP

Jun 29, 2014 | Frigidaire FDF50S Dehumidifier

1 Answer

For some reason the coils seem to have iced up. I doesn't seem to drain anynore into the reserve tank. What do I need to do?


Hi,

Here is a tip that I wrote that will help you understand why and what you cando with a dehumidifier that ices up.

Dehumidifier is Freezing up and not working

heatman101

May 30, 2011 | Crosley Dehumidifiers

1 Answer

My whirlpool AD50USS2 keeps freezing up and then runs into the bucket. It is connected to a drain hose. What causes it to freeze up?


Hi,
Dehumidifiers freezing up can be causes by a few different problems.
Here is a tip that I wrote to help people with the freezing dehumidifier problem....

Dehumidifier2_bing.gif is Freezing up and not working
http://www.fixya.com/support/r4662033-dehumidifier_freezing_up_not_working

heatman101

May 03, 2010 | Whirlpool AD40DSL Dehumidifier

1 Answer

I just get a dehumidifier it was on all night and the bucket its dry u think theres something wrong with it and whats the % that i have to set it up


% is the % humidity you want.

This is a DEhumidifier for to take water out of air for moist areas.

Usually a setting of 50% or 60% is dry enough. If it is freezing outside, inside of home is probably alreadt below 50%.

If you place in basement below 60 degree, will freeze up. Place over floor drain or in tub and leave off overnight.

Dec 05, 2009 | Goldstar DH504EL Dehumidifier

1 Answer

Freeze up in back & does not drain


Usually due to dirty filters or maybe a drain tube blocked.. Or sometimes the casing is damaged & the lining has moisture in it. Therefore when the device is running, it freezes the moisture in the lining.. If it's the drain tube, you might be able to clean it with a long bit of wire & some bleach.. That can kill any mold thats grown in the drain.. Let me know how you go..

May 23, 2008 | Goldstar DH504EL Dehumidifier

Not finding what you are looking for?
Maytag M7DH45B2A Dehumidifier Logo

1,071 people viewed this question

Ask a Question

Usually answered in minutes!

Top Maytag Dehumidifiers Experts

Bill Long

Level 3 Expert

577 Answers

Daniel Phillips
Daniel Phillips

Level 2 Expert

63 Answers

Steve

Level 3 Expert

3287 Answers

Are you a Maytag Dehumidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...