Question about Maytag M7DH45B2A Dehumidifier

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Dehumidifier My Dehumidifier is blowing hot air, everything else seems to be working but it increases the rooms temperature by blowing hot air. why is it blowing hot air?

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Again, if your model is one that can be used in cooler temps so as not to ice up, the heat prevents this.

Posted on Oct 02, 2008

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Why is it blowing cold air?


A dehumidifier should blow cold air Carole. It takes in warm moist air, chills it, condenses the water out of the air and returns it chilled and dry to the room. That is the function of a dehumidifier. They often have the function of an air conditioner and blow cold air out of one outlet into the room and hot air out of the window via a venting hose. If yours is just a dehumidifier, it is working as designed

What were your expecting a dehumidifier to do?

Jan 15, 2016 | Amcor Dehumidifiers

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Dehumidifier is Freezing up and not working


If you are having problems with your dehumidifier freezing up them here are a few things that you can check and also a few things that may help you.

First check the ambient temperature of the room at the level of the dehumidifier. If it is below 65 degrees and you do not have a special low temperature dehumidifier then you are asking for trouble. Most units are only designed to work in temperature 65 or higher and will freeze if they are working at lower temperatures. Some even will not work well below 68 degrees F.

Many dehumidifiers will shut off when the coil starts to freeze to let them thaw, then they will restart when the coil is warm enough again. This can take an hour or so. Some will not shut down the compressor and when the dehumidifier coil starts to freeze it reduces the air flow and only compounds the problem.

Check the air flow over the coil. If the coil becomes dirty or the fan motor stops or even slows down a bit, you will get freezing. The dehumidifier is very dependent upon the proper amount of air going over the coil to keep the coil warm enough to not freeze. Any restriction will cause problems.

The final and worst thing that can happen is for your dehumidification unit is to develop a slight leak in the refrigeration system. This will cause the coils to run even colder then they would normally and this will create the same problems. If everything else check out then you may have to have the refrigeration system checked by a professional. The problem with this is that many of these units only cost a few hundred dollars and a service call can soon add up to more then the unit is worth.

Some things that you can do to help out a dehumidifier that is freezing up are:

Raise the temperature of the room and provide a bit of heat for the room as the dehumidifier is actually a very small A/C unit.
Raise the dehumidifier up off of the floor… the air is usually warmer when you go higher up in the room, hot air rises.
Clean the coils off so that the air can flow through them easier and keep them warmer.
Make sure that the fan motor bearings are oiled and that the fan is running freely. Even a tiny bit of resistance will slow the fan enough to make a difference.


By checking all these things out and making some small changes you maybe able to make your dehumidifier work much more effectively.

http://www.fixya.com/support/r3877515-dehumidifier_problems_dehumidifier

http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

http://www.fixya.com/support/r4688381-dehumidifier_problem_shows_bucket_full

on Apr 30, 2010 | Dehumidifiers

1 Answer

My dehumidier blows very hot air while working. Makes it hotter than it was before starting. Like a furnace.


It is normal for a dehumidifier to discharge warm air. A dehumidifier is really an air conditioner - a fan blows humid room air across a cold fin coil that causes the moisture to condense on it and drip into a container - thus cooling AND dehumidifying the air. The cool air is blown over the warm coil and discharged out the back. A dehumidifier WILL normally increase the temperature of the room it is in.
You can do the same thing with sitting an A/C unit on a stool in a room. Room air will be drawn in, cold air will come out the front, hot air out the back and water will drip on the floor. And, the room will get hotter, due to what is called "heat of compression" even though you're running an A/C unit.

Jun 26, 2013 | Windchaser WDH928 Dehumidifier

2 Answers

Does not collect water in bucket but runs all the time


Does it have a filter?
http://whirlpool.custhelp.com/app/answers/detail/a_id/953

also:

"
It may be that the humidity level or temperature in the room where your dehumidifier is located is too low.

When the outdoor temperature is below 50 F, the indoor air will be dry even when the air inside is warm, therefore when it's cold outside the dehumidifier may collect little or no water.

Air conditioners will also remove moisture from the room, even if it's hot and humid outside, resulting in little or no moisture collecting in the dehumidifier bucket.

Some dehumidifiers have a deicer which turns off the compressor but keeps the fan running. When the compressor is off, moisture is not removed from the air. The deicer turns off the compressor when the room temperature is cold.

Some dehumidifiers do not have a deicer. If the room temperature is low enough, ice may form on the evaporator coil. The ice prevents the dehumidifier from removing and collecting water. If ice forms on coils, unplug dehumidifier until ice melts and room temperature rises."

Jun 21, 2011 | Whirlpool AD25BBK Dehumidifier

2 Answers

Dehumdifier not collecting water.


It may be that the humidity level or temperature in the room where your dehumidifier is located is too low.

When the outdoor temperature is below 50 F, the indoor air will be dry even when the air inside is warm, therefore when it's cold outside the dehumidifier may collect little or no water.

Air conditioners will also remove moisture from the room, even if it's hot and humid outside, resulting in little or no moisture collecting in the dehumidifier bucket.

Some dehumidifiers have a deicer which turns off the compressor but keeps the fan running. When the compressor is off, moisture is not removed from the air. The deicer turns off the compressor when the room temperature is cold.

Some dehumidifiers do not have a deicer. If the room temperature is low enough, ice may form on the evaporator coil. The ice prevents the dehumidifier from removing and collecting water. If ice forms on coils, unplug dehumidifier until ice melts and room temperature rises.

The filter (on some models) may be dirty or clogged. If so, clean the filter. For instructions on cleaning the filter.

I hope this help to solve, if this answer solve it, remember to rate it. Good luck.

Oct 01, 2010 | Whirlpool AD50USL Dehumidifier

1 Answer

Goldstar Dehumidiflier coil freezes


Hi, If you are having problems with your dehumidifier freezing up them here are a few things that you can check and also a few things that may help you.

First check the ambient temperature of the room at the level of the dehumidifier. If it is below 65 degreesand you do not have a special low temperature dehumidifier then you are asking for trouble. Most units are only designed to work in temperature 65 or higher and will freeze if they are working at lower temperatures. Some even will not work well below 68 degrees F.

Many dehumidifiers will shut off when the coil starts to freeze to let them thaw, then they will restart when the coil is warm enough again. This can take an hour or so. Some will not shut down the compressor and when the dehumidifier coil starts to freeze it reduces the air flow and only compounds the problem.

Check the air flow over the coil. If the coil becomes dirty or the fan motor stops or even slows down a bit, you will get freezing. The dehumidifier is very dependent upon the proper amount of air going over the coil to keep the coil warm enough to not freeze. Any restriction will cause problems.

The final and worst thing that can happen is for your dehumidification unit is to develop a slight leak in therefrigeration system. This will cause the coils to run even colder then they would normally and this will create the same problems. If everything else check out then you may have to have the refrigeration system checked by a professional. The problem with this is that many of these units only cost a few hundred dollars and a service call can soon add up to more then the unit is worth.

Some things that you can do to help out a dehumidifier that is freezing up are:

Raise the temperature of the room and provide a bit of heat for the room as the dehumidifier is actually a very small A/C unit.
Raise the dehumidifier up off of the floor… the air is usually warmer when you go higher up in the room, hot air rises.
Clean the coils off so that the air can flow through them easier and keep them warmer.
Make sure that the fan motor bearings are oiled and that the fan is running freely. Even a tiny bit of resistance will slow the fan enough to make a difference.


By checking all these things out and making some small changes you maybe able to make yourdehumidifier work much more effectively.

Aug 11, 2010 | Goldstar DH504EL Dehumidifier

1 Answer

We inherited a 655e. It seems to function properly, at least it responds to controls the way it should. It does dry the air, the bucket will slowly fill, but the unit blows warm or hot air. I'm new to this...


Dehumidifiers are designed to remove the moisture from the air not to cool. Unfortunately, the way they remove this moisture is to reheat the air to further dry it after it releases its moisture. Basically, the room temperature humid air enters the dehumidifier where it is cooled to its dew point which results in its releasing its moisture. This dried air is then heated by the combination of latent heat of condensation, which is a natural result of the process, and by circulating through the condenser where heat is exchanged from it to the air. The result is the air going back into the room will be slightly warmer than it was going in, usually around 2 to 5 degrees.

Aug 09, 2010 | Haier HDN655E 65 Pint Dehumidifier...

1 Answer

I have an Aprilaire 1750 installed inline with my upstairs central air system in the attic. The unit's ducting appears to be installed as indicated in the installation manual, but when the unit is running...


Your dehumidifier is likely working correctly. When operating and removing moisture, a dehumidifier will supply warm/hot air to your house. Your dehumidifier moves less air than your A/C, so your supply ductwork in your house is oversized for the dehumidifier. This will lead to uneven feeding of your supply duct branches with just the dehumidifier operating.

Since your dehumidifier is installed in the attic, make sure that the ducting connected to it is well insulated. Also make sure that your dehumidifier cabinet is insulated. These actions will help prevent heat gain from the hot air in your attic.

Is your dehumidifier bringing in fresh air from outside? If the outside air is hot and humid, the dehumidifier will supply warmer air to your home.

Some people run their A/C fans continuously to help with the air distribution, but this is a bad idea since it increases energy usage considerably.

DryDog

Aug 06, 2010 | Aprilaire 1700 Dehumidifier

1 Answer

Dehumidifier throws off hot air making the room very warm. Is that normal?


Yes! A dehumidifier is an entire AC system in one box. First the air passes thru a very cold coil causing moisture in the air to condense and run away. Then the air is re-heated thru a hot coil (the other half of the AC) and blown back into the room. The net result MUST be a net increase in temperature because of the heat added by the mechanical process.

May 17, 2009 | Goldstar DH504EL Dehumidifier

1 Answer

Danby Dehumidifier Model # DDR557HE Serial # 0107030704369 --Does not collect water and cxontinues to frost up


Hi,
If you are having problems with your dehumidifier freezing up them here are a few things that you can check and also a few things that may help you.

First check the ambient temperature of the room at the level of the dehumidifier. If it is below 65 degrees and you do not have a special low temperature dehumidifier then you are asking for trouble. Most units are only designed to work in temperature 65 or higher and will freeze if they are working at lower temperatures. Some even will not work well below 68 degrees F.

Many dehumidifiers will shut off when the coil starts to freeze to let them thaw, then they will restart when the coil is warm enough again. This can take an hour or so. Some will not shut down the compressor and when the dehumidifier coil starts to freeze it reduces the air flow and only compounds the problem.

Check the air flow over the coil. If the coil becomes dirty or the fan motor stops or even slows down a bit, you will get freezing. The dehumidifier is very dependent upon the proper amount of air going over the coil to keep the coil warm enough to not freeze. Any restriction will cause problems.

The final and worst thing that can happen is for your dehumidification unit is to develop a slight leak in the refrigeration system. This will cause the coils to run even colder then they would normally and this will create the same problems. If everything else check out then you may have to have the refrigeration system checked by a professional. The problem with this is that many of these units only cost a few hundred dollars and a service call can soon add up to more then the unit is worth.

Some things that you can do to help out a dehumidifier that is freezing up are:

Raise the temperature of the room and provide a bit of heat for the room as the dehumidifier is actually a very small A/C unit.
Raise the dehumidifier up off of the floor… the air is usually warmer when you go higher up in the room, hot air rises.
Clean the coils off so that the air can flow through them easier and keep them warmer.
Make sure that the fan motor bearings are oiled and that the fan is running freely. Even a tiny bit of resistance will slow the fan enough to make a difference.


By checking all these things out and making some small changes you maybe able to make your dehumidifier work much more effectively.

Take care

Mar 23, 2009 | Danby DDR586R Dehumidifier - 58 Pints...

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