Question about Whirlpool AD75U Dehumidifier

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Unit runs but is not operating properly.

It only exhausts cool air (rather than warm as it did when it was working). Does not pull any moisture out of the air.

Whirlpool Model AD75UST0 - Unit is about 2 years old.

BTW - also have the same problem with a Whirlpool AD50USL5 unit. I don't want to by a 3rd unit! Please help.

Thanks

Steve

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  • Whirlpool Master
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Hi,
There are many reasons for a dehumidifierUnit runs but is not operating properly. - 2_bing.gif to not work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier2_bing.gif.

Dehumidifier is running but no water is in bucket
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

Posted on May 05, 2010

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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

1 Answer

Coil_Freezes_Up on a model DDR4507EE danby dehumidifier


If the unit runs normally and the coils are just icing up, then that probably means the unit itself is actually working well, but you probably just have the settings turned up too high for the conditions.



Try turning down the setting on the unit so that it cycles on and off every few hours and does not run continuously.



Also try using some warm soapy water to clean off any dust or oily residue from the cooling coils in the rear of the unit. Remember to also clean the air intake filter while you are at it.



The ambient temperature in the room may also be a bit too low, so you can try adding some heat to the room if necessary. A dehumidifier will not work properly if the ambient air temperature is too low. Basically, the warmer and more humid the room is, the better they work. Since warm air rises, you can even try lifting the unit higher up off the cold floor onto a bench or table where the air is warmer.



You can click on the following link for a general operating and troubleshooting guide with additional tips on effective dehumidifier operation:


http://www.allergyconsumerreview.com/dehumidifier-advice-troubleshooting.html



I hope that was helpful to you, good luck and take care.




Joe.

Oct 23, 2011 | Dehumidifiers

1 Answer

Model BHD 651-C Serial 611TA000375 Problem: Unit comes on, fan operates but compressor is not kicking in. While the fan operates it is not pulling any moisture out of the air. Controls indicate that...


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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Jun 09, 2011 | Comfort-Aire BHD-651 Dehumidifier

1 Answer

My LG Dehumidfier 3850A20500H has stopped pulling moisture from the air it still runs but no wataer in the bucket what could be the problem? this starts happening after 1 year of purchase.


There are several things that can cause the problem you described. Most of which are easily remedied.

1. The humidity/moisture extraction level is set to high. Lower it to 35%

2, Air intake filter is dirty or clogged. Remove and clean the filter.

3. Refrigerant coils on the back of the unit are dirty and need to be cleaned.

4. Not enough clear air space around the unit. Maintain at least a minimum of 12" of clear air space all around the unit.

5. Unit is operating in a room that has an ambient air temperature at floor level, of between 40 -60 degrees F. Most dehumidifiers don't work well between those temperatures. Raise the unit up off the floor on to something sturdy enough for the weight of the dehumidifier when the bucket is full.

The above are the top 5 things that can cause a dehumidifier not to work properly. Fortunately, none of the solutions require any major repair to the unit.

Hope this helped you to further troubleshoot and solve the problem.

Jun 06, 2011 | LG Dehumidifiers

1 Answer

Our humidifier seems to be broken. Its fan will run constantly, but it is not pulling any moisture in to the bucket. I cleaned the filter and restarted, but is still not working.


If the machine's compressor runs when you switch it on, then turn the machine on maximum and let it run for an hour or so. Then check the coils in the back with your hand. If they are not getting cold at all, then there is a significant problem with the refrigeration process in the unit. It may have developed a leak and allowed your refrigerant gas to escape, or there may be another internal problem with the compressor. Either way you would need to have it serviced by a fridge technician, or more likely just replaced with a whole new unit since both options can potentially cost about the same.

If the unit runs normally and the coils are getting cold, then make sure they are not totally icing up which will impede the unit's performance. If your dehumidifier is freezing up then that probably means the unit itself is actually working well. The humidity level in the room may be relatively low and you probably have the unit turned up too high for the conditions.

Try turning down the setting on the unit so that it cycles on and off every few hours and does not run continuously.

Also try using some warm soapy water to clean off any dust or oily residue from the cooling coils in the rear of the unit. Remember to also clean the air intake filter while you are at it.

The ambient temperature in the room may also be a bit too low, so you can try adding some heat to the room if necessary. A dehumidifier will not work properly if the ambient air temperature is too low. Basically, the warmer and more humid the room is, the better they work.Since warm air rises, you can even try lifting the unit higher up off the cold floor onto a bench or table where the air is warmer.

You can click on the following link for a general operating and troubleshooting guide with additional tips on effective dehumidifier operation:

http://www.allergyconsumerreview.com/dehumidifier-advice-troubleshooting.html
?
And here is a link to a tip from another Expert (Heatman101) which includes his very detailed troubleshooting guide for dehumidifiers:

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

I hope that was helpful to you, good luck.

If you choose to rate this solution using the Thumbs Up scale provided, I thank you very much for your time and consideration.

Joe.

May 29, 2011 | LG LHD459EL Dehumidifier

1 Answer

Unit runs but doesn't collect water and there is a lot of water in the basement. Have had dehumidifier for two weeks and was working well before.


Keep in mind, that a dehumidifier only draws humidity from the air, if the level of humidity is higher than what the controls are set on. For instance, if you have the dehumidifier set on 65 to 70%, that's a high level of humidity to maintain in a house. If you have it set for 35 or 45%, that's a low level of humidity to maintain in a house. Which, generally is what you want to maintain in the hot, humid summer months. Also, it's not uncommon on some dehumidifiers for the fan to almost run constantly. It's designed to keep the air moving, in a effort to detect when the humidity level rises.

Also, a dirty air intake filter makes the unit strain to keep up and can't take in moisture as it should. So, if you haven't cleaned the filter no is the time to check and clean it. And while your at it, clean the cooling coils too. Since it sounds like this unit has been working hard for 2 weeks.

The easiest and best way to test a dehumidifier at home, to see if it's working properly. Is to place it in the bathroom and turn the shower ON and don't operate the bathroom's exhaust fan. Set the humidity level low (45%), turn the unit ON and close the door when you leave. Wait 15 to 25 minutes and check the water collection bucket. If there's water in it, it's working as it should.

For more information on the proper operation of a dehumidifier, go to the Tips section of Fixya and look up "Taking the confusion out operating a dehumidifier".

Hope all this helps you troubleshoot and solve the problem. Please let me know. Thanks.

May 04, 2011 | Dehumidifiers

1 Answer

Motor runs, but dehumidifier does not collect water


Keep in mind, that a dehumidifier only draws humidity from the air, if the level of humidity is higher than what the controls are set on. The fan running, may be the automatic defrost cycle, that defrost the coils, if they become frosted over. The defrost cycle, depending on the unit and how is was designed, can last any where from 15 minutes up to 45 minutes.

Also, a dirty air intake filter makes the unit strain to keep up and can't take in moisture as it should. So, if you haven't cleaned the filter on a regular basis, not is the time to do so. And while your at it, clean the cooling coils too.

The easiest and best way to test a dehumidifier at home, to see if it's working properly. Is to place it in the bathroom and turn the shower ON and don't operate the bathroom's exhaust fan. Set the humidity level low (45%), turn the unit ON and close the door when you leave. Wait 30 to 40 minutes and check the water collection bucket. If there's water in it, it's working as it should.

Hope this helped you to solve the problem. Please let me know.

May 03, 2011 | Whirlpool Dehumidifiers

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

Air conditioners remove the moisture from the air, and so does a dehumidifier. Does running a dehumidifier make the air conditioner run less? Does running the small dehumidifier save energy in that the...


a dehumidifier is basically the same thing as an air conditioner but both coils (condenser and evaporator) are in the same unit meaning a dehumidifier exhaust warm air in the same room it is in. running a dehumidifier would make an air conditioner run more because of the warm exhaust, but you are correct, when you run an air conditioner it acts like a dehumidifier and dries the air. as far as saving energy it all depends on the size of the AC and dehumidifier and the size of the room. If you want warm dry air use a dehumidifier if you want cool dry air run the AC but not both.

May 18, 2010 | Dehumidifiers

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