Why Is My Dehumidifier Blowing Cold Air? 3 Vital Checks

Why is my dehumidifier blowing cold air? A couple of times in the life of your dehumidifier, you might come across the problem of the unit blowing cold air.

Well, appliances make our life so much richer and enjoyable. However, they do have some side effects too. For instance, in the past we looked at an article on humidifier sickness symptoms. Yeah, it is not all bliss now, is it?

So, why is my dehumidifier blowing cold air? Start by checking the basic things such as water. If the dehumidifier is not dehumidifying, that is the reason why it is blowing out cold air. By design, dehumidifiers should blow out hot air. Air conditioners blow out cold air to cool the room.

A dehumidifier should blow out hot air. The heat further lowers the humidity. When my dehumidifier blows out cold air, I know there is a problem.

In the past, we looked at Pure Enrichment Humidifier not working.  Many things can cause this.

We also looked at the problem of humidifier white dust. But do not let these problems dissuade you from getting a humidifier.

You can see there is always something to take care of.  When you take care of your appliances, they take good care of you.

Most people ask why their Hisense dehumidifier is blowing cold air, but all dehumidifiers work the same way, irrespective of brand name.

How to Troubleshoot Dehumidifier Blowing Cold Air

Just put your hand against the vents of the dehumidifier, you will feel hot and dry air coming out of the appliance. That is how it is supposed to work.

But if you feel cold air on your hand, you need to find out what is not working as it should. It could be one of the following things:

The compressor might not be working

When the compressor inside the dehumidifier is working, it will release hot air to the surrounding. If you notice that you are only getting cold air, you might want to check the compressor. There have been many issues of the dehumidifier compressor not working.

When the compressor is broken, you might know from a clicking noise that starts when you turn the unit on.

But first, what does the compressor do? Its main work is to circulate the refrigerant throughout the humidifier coils.

The coils then condense vapor from the hot air that the appliance has drawn from the room. That way, the water (humidity) is collected in a reservoir or it is drained out.

Image of dehumidifier blowing cold air and not collecting water
Dehumidifier compressor

If the compressor breaks down, the refrigerant is not going to circulate. Therefore, the coils will not condense the vapor and the dehumidifier will blow out cold air.

Simply put, when the compressor fails, it means the dehumidifier is not dehumidifying.

What can you do about a failed compressor for a dehumidifier blowing cold air fix? Well, if you are in Canada or in the USA, call the manufacturer or email them if the warranty is still valid.

If the warranty period is expired, just buy a new dehumidifier since replacing a compressor can cost a lot.

Dehumidifier blowing cold air and not collecting water

If you have a dehumidifier that blows cold air and is not collecting water, you need to fix it or replace it. With such issues, it means the appliance is not dehumidifying your indoor air.

The main cause of the dehumidifier not collecting water is a broken compressor. I guess this brings us to the problem of the compressor then, which means having to buy another appliance or calling for a replacement if the warranty is still valid.

If the dehumidifier coils do not have refrigerant flowing through them, it means there is no condensation taking place. Therefore, the air comes back into the room cold and humid.

When the dehumidifier coils are icing up

It is recommended that you run a dehumidifier in a temperature of 60 degrees Fahrenheit on the lowest. However, some dehumidifiers might be able to operate in a temperature as low as 42 degrees Fahrenheit.

If you are running it in low temperature, you might have the problem of a dehumidifier blowing cold air. When the coils ice up, the dehumidifying operation shuts down so that air can blow over the coils and thaw them out.

In such a case, taking the dehumidifier to a warmer room will get it to start blowing hot air out again. It is also a good idea to check whether the dehumidifier coils are clean.

When the coils are iced over, the dehumidifier might start leaking from the bottom as the ice starts to thaw out.

Why is my dehumidifier blowing cold air FAQ

Sometimes, it is as if appliances have their own mind. Therefore, you can truly never know enough about them. In this FAQ section, we shed more light on why dehumidifier blows cold air:

Image of what temperature should air coming out of dehumidifier be

Should my dehumidifier be blowing out cold air?

Dehumidifiers should blow out warm and dry air. All the same, they can cool a room because dry air feels colder than damper air. If you put your hand against the vents, you should feel warm air blowing out.

What temperature should the air be coming out of a dehumidifier?

The temperature for the air coming out of a dehumidifier should be about 70°F. Some of them can also do up to 90°F. If the air is not cold, there is nothing to worry about.

Why is my dehumidifier blowing cool air?

Check whether the appliance is set to defrost mode because then, it will only blow out cool air. However, when you disengage the defrost mode, the dehumidifier should start blowing warm air into the room. If it continues to blow cold air, something is wrong.

How do I stop my dehumidifier from blowing hot air?

If the unit is blowing hot rather than warm air into the room, it is mostly dirty and it needs to be cleaned up. Turn it off, wait for it to cool down and then clean it. That should resolve the problem.

Do dehumidifiers make the room warmer?

If a dehumidifier is set in a small room, it will make the air warmer. In a large room, there might not be a noticeable change in temperature. If you stand close to your unit, you will feel warm air coming from the vents.

What should I set my dehumidifier at?

The comfortable humidity level for your home is 30 to 55 percent. 40 to 60 percent is just okay but higher than that, say, 70 percent is too high. Too high humidity can lead to allergy provocation and the growth of mold.

Best dehumidifiers that won’t blow cold air

If you are looking for a dehumidifier, you might want to try any of the three in this table, especially after looking at their features:





Gocheer Upgraded Dehumidifier

2000ml tank

Space rating of up to 480 sq. ft

Auto shut-off and red LED light when tank is full

Energy saving and low noise level

SEAVON Dehumidifiers

Low noise level and auto shut off

Mini dehumidifier for small rooms of up to 215 sq. ft

Starts working when humidity rises higher than 45%

Airplus Large Room Dehumidifier

Space rating of 1500 sq. ft

Comes with 52 inch drain hose

For basements and large rooms

30-pint tank size

Wrapping Up

That is it for the question of: why is my dehumidifier blowing cold air?

You have seen the three main causes of a dehumidifier that blows cold air. If yours does that, it means it is faulty. This appliance should always blow hot air into the room.

That is why you cannot use it as an air conditioner.  A dehumidifier blowing warm air is just doing what it is supposed to do.

Mostly, the problem of humidifier blowing cold air and not collecting water comes with age. If it is old and the coils are not iced over, just buy a new one.

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