Question about Dehumidifiers

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Sometimes it blows out warm air warm enough to warm an entire room, yet at other times is blows cool air that can kkep a room cool. I want it to blow cold at all times. how do i do that?

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Dry air feels cool on the skin

moist air feels warm on the skin

this is why the perceived temperature of air from unit changes

Posted on Apr 15, 2015

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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

1 Answer

How do you clean the filter


In order to look up the filter change procedure I would need the specific model number. However, filter changes or washing should be done regularly. Look for a very simple lift-out design that is washable in the kitchen or laundry sink. Soak in soapy water and rinse with spray nozzle.

As for the symptom "Blows out warm air" this is expected. The dehumidifier is less than 100% efficient, meaning that the energy that is used produces heat in the exhaust air. A 100% efficient design would still send all the heat energy of condensation (endothermic phase change) into the exhaust air. You should expect 1072 BTU per pint (1 pound of water). This is far more than the heat of crystallization (144 BTU per pound of ice) and therefore much more sensible when you feel the discharge air from the dehumidifier. Dehumidifiers typically operate in basements to both warm and dry the area where a sump pump may be operating to remove the water that seeps through the foundation. A dehumidifier is not a good idea for warm areas of the house. This will decrease the efficiency by increasing the temperature differential needed to get the evaporator coil below the dew point to cause condensation. The condenser coil will be much hotter than expected if the unit is operated in a warm humid room. Only air conditioners which discharge condensate and exhaust air to the outside of the structure should be used to cool a room.

Jul 06, 2014 | GE 50-Pint Dehumidifier

1 Answer

Using as heater and unit is blowing cold air


A heat pump is an air conditioner that reverses its refrigerant flow. In the cooling mode, the evaporator is cold to the room and its condenser is hot. In the heating mode, a valve reverses the refrigerant flow and makes the evaporator warm and the condenser cold.

Nov 24, 2013 | Soleus 10,000 Btu Portable Ac Air...

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

1 Answer

My delonghi dehumidifier will not cool the house just keeps blowing warm air and dosnt feel to cool were thinking about giving up on it


Dehumidifiers aren't supposed to cool your house. If anything they generate heat. How it works is, it has cooling coils that it draws air across, which causes the moisture to condense, and be captured. However the heat extracted from the air has to go somewhere, so it just blows out the other side. If you want cool, buy an air conditioner.

Sep 09, 2012 | DeLonghi Dehumidifiers

1 Answer

No water collected


check to see if the fan is blowing across the condenser. there should be warm air blowing out the back. if there isn't, the fan may need to be replaced so the heat exchanger can cool down. may be running too hot. also check the condenser in the front to see if the air flow is blocked with dust. if so, change the filter if it has one. if there is cool air blowing, the compressor may not be turning on.

May 11, 2012 | Dehumidifiers

1 Answer

Compressor keeps turning on and off, I can hear it and it dims the lights showing an increase in power draw, it will blow the main circuit breaker to the house. Therefore it does not run enough to remove...


If when it's running it dims the lights in the room or entire house, The circuit breaker for the receptacle it's plugged into, is not a high enough amperage to carry the dehumidifier and whatever other electrical appliances that are on the same circuit. OR if your house is hold enough (1970's era), it may have aluminum wiring and its overheating .

If it's blowing the Main Circuit Breaker for the entire house and not just the circuit breaker for the receptacle it's plugged into, Stop using the dehumidifier immediately!!! Have an certified electrician check your home's circuit breaker panel and wiring. This could be a dangerous situation.

Mar 01, 2011 | Maytag M3DH30B2A 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

My Soleus Dehumidifer is not dehumidifying


If the room temperature is close to 60, the coils may be frozen (completely encased in ice). If this is the case, move it where the water can drain off - about 1 gallon which may NOT run into the drain bucket.
I out mine over the floor drain.
Turn off and it will defrost over night.
Only specially made dehumidifiers work below a room temp of 60 degrees (the temp of a basement in winter).
Does it need to be running? A digital humidity sensor from Radio Shack is cheap and may tell you the humidity is OK - only 50% or less.

Dec 30, 2009 | Soleus CFM-40 Dehumidifier

2 Answers

The dehumidifier is blow cold air


Is it collecting water? The air coming out the back top half should be cool/warm. It will be a little warmer at the bottom near the compressor.

Apr 07, 2009 | Kenmore 54701 Dehumidifier

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