How to Fix A Dehumidifier That Blows Cold Air?

A dehumidifier that blows cold air could be frustrating for you, especially when you are trying to reduce the humidity levels in your office or home. A humidifier that blows cold air could be a concern for you, and you might be wondering how to fix it.

Well, your dehumidifier is blowing cold air for various reasons. For instance, if the coils of your dehumidifier are frozen with ice, it could lead to cold air. 

Apart from that, there are multiple other reasons which could cause cold air in a dehumidifier. Below we have listed 5 major reasons why your dehumidifier is blowing cold air. Let’s check them out!

5 Reasons Why Your Dehumidifier Is Blowing Cold Air

In this section, we will look at the top 5 reasons why your dehumidifier is blowing cold air rather than regular, warm, or moist air. We will also go over the most common causes of this problem and offer some advice on how to troubleshoot and resolve it.

1. Frozen Coils

One of the most common problems which cause a dehumidifier to blow cold air is the frozen coils. Most dehumidifier comes with coils inside them which collect the moisture in the air and convert it into water. 

However, if the moisture collected on the coils is too cold or of low temperature, it will convert into the ice instead of water which will freeze the coils. And when the fan blows air after the coils are frozen, it results in cold air. 

Apart from that, if your dehumidifier is running at a very low temperature, it will also result in cold air since the coils get frozen with ice on them. 


To fix the frozen coils problem in a dehumidifier, you have to defrost the dehumidifier coils. There are many ways to defrost the dehumidifier. One of the simplest ways to defrost the dehumidifier is by adjusting the temperature if it has temperature settings.

Suppose your dehumidifier doesn’t have adjustable temperature settings. In that case, you can simply turn off the dehumidifier for a few hours or minutes, and the ice will automatically defrost from the coils. 

If you want to defrost the coils instantly, you can open the dehumidifier and locate the coils. You can manually defrost or remove the ice from the coils and use the dehumidifier at normal temperature. Hopefully, these solutions will resolve your problem.

2. Dehumidifier Malfunctioning

When your dehumidifier starts malfunctioning, it will result in a cold air blow since it will not be able to produce hot air anymore. There are a few things you need to check when the dehumidifier starts malfunctioning. But before everything else, ensure that there is no ice on the dehumidifier coils.


First of all, check the dehumidifier float switch. If the float switch is working fine, then you should inspect the drain pipes and ensure that they are not clogged. If the drain pipes are clogged, it can cause cold air to blow. So make sure to clean the clogged drain pipes. 

Apart from that, check the air filter. If the air filter is filthy or blocked, you may either clean and reuse it or replace it if necessary. 

Also, check the dehumidifier coils, and if they are dirty, you need to clean the dehumidifier coils thoroughly. Last but not least, you will have to check the dehumidifier for defective capacitors or faulty motor fans, which lead to cold air.

3. Defrost Mode Is On

If you have turned on the defrost mode in your dehumidifier, then the dehumidifier will blow cold air during the defrost process. Apart from that, if your dehumidifier is switched to “fan only” mode, it will also cause cold air to blow. 

Some dehumidifier models turn the defrost mode on, which can also lead to cold air blow. This happens when the dehumidifier sensors find out that the coils are frozen and need to defrost them. 


If your dehumidifier has turned on the defrost mode automatically, then you do not need to worry. It will defrost the coils and will automatically start blowing hot air after some time. 

However, if you have mistakenly turned on the dehumidifier defrost mode, then you may need to turn it off to stop the cold air blow. Also, if you have mistakenly switched the dehumidifier to “fan only” mode, you will have to switch it back to normal mode. 

4. Your Dehumidifier is Desiccant

You might have bought a desiccant dehumidifier instead of a normal dehumidifier that blows cold air. A desiccant dehumidifier absorbs the excessive moisture in the air using the desiccant wheel and the regeneration system. 

You need to check whether or not you have a desiccant dehumidifier by looking at the user manual or the box of the dehumidifier. If it is a desiccant dehumidifier, then you do not need to worry about anything. 

Also Read: 4 Best Battery-Operated Dehumidifier In 2023

5. Indoor Temperature is Low

If the temperature inside your home is too low, around 10 to 15 degrees, or if the air conditioner is operating at a low temperature in your room and the dehumidifier is on, then the dehumidifier will eventually draw cold air instead of warm air. 

This is due to the fact that low temperatures can result in cold moisture collection on the dehumidifier coils, which will make ice on the coils. Hence, the dehumidifier will blow cold air only instead of warm air. 

To fix this issue, you need to ensure that the indoor temperature is not too low to use the dehumidifier, or else the dehumidifier will blow cold air.

Which Air Should Come Out Of A Dehumidifier: Hot or Cold?

Depending on the type of dehumidifier you are using, it can blow hot or cold air. However, generally, dehumidifiers blow normal air, which has a temperature of around 10 to 15 degrees. 

You may check the dehumidifier manual to ensure that you have to hot or cold dehumidifier. If your dehumidifier is blowing excessively cold or hot air, then you need to troubleshoot the dehumidifier and fix it if something is wrong with it.

Why Your Dehumidifier Is Not Collecting Water While Blowing Cold Air?

Dehumidifiers that do not collect water even when they are blowing cold air, then it could be because of the frozen coils. 

Some premium dehumidifier comes with an auto-defrost feature that enables the dehumidifier to turn on the defrost mode automatically on, and it will go back to normal airflow when the defrost mode is turned off automatically when the coils are completely defrosted. 

If your dehumidifier does not have the automatic defrost feature, then it will still blow cold air since the ice has frozen the dehumidifier coils. 

In this case, you have to manually defrost the dehumidifier either by turning off the dehumidifier or by opening and cleaning the dehumidifier coils with a cleaning solution. 

Make sure that your dehumidifier is always blowing hot or warm air, you can measure the air temperature using a temperature sensor if your dehumidifier doesn’t have it. To ensure that the dehumidifier works properly, you need to make sure that it blows air, which has a temperature of around 65 degrees Fahrenheit. 

What Should the Temperature of the Air Be Coming Out of the Dehumidifier?

Most of the dehumidifiers are similar and blow warm air while operating. Ideally, the dehumidifier should produce air that is 70 to 90 degrees Fahrenheit. 

But if the dehumidifier is operating at an even low temperature which is less than 65 degrees Fahrenheit, then you need to troubleshoot and fix it. Since the temperature might go even lower and the dehumidifier will start blowing colder air. 

If your dehumidifier is blowing cold air as your air conditioner, then it is an indication that something is wrong with the dehumidifier.

Why Is the Dehumidifier Making the Room Cold?

Dehumidifier eliminates the humidity from your room, which can lower the temperature of your room, and you may even feel colder than before, especially when you are using the dehumidifier for the first time and your house is too humid.

Using a dehumidifier in a high-humidity location can eventually drop the temperature significantly. Once the humidity is maintained in the room, you will feel the environment has become slightly cold and much more comfortable than before.


So, that is all you need to know on how to fix a dehumidifier that blows cold air. If your dehumidifier is still blowing cold air and you have inspected and tried all the methods listed above, then it is time for you to call customer service and ask them to fix the dehumidifier.

We hope that you can easily fix the dehumidifier that blows cold air with the solutions given in this guide. Since fixing a dehumidifier that blows cold air is not rocket science, and anyone can fix it. Make sure you have the right tools or equipment while opening or trying to repair the dehumidifier. 

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