Should Dehumidifier Blow Cold Air?

Discover the damp dilemma: Does your dehumidifier deliver chilly air? You’re about to embark on an enlightening exploration of this enigma.

Don’t fret; we’re here to provide you with the knowledge you seek. Uncover why your dehumidifier might blow cold air, leaving you yearning for warmth.

From potential issues to the impact on room temperature, we’ll delve into the depths of this puzzling predicament.

So, join us on this captivating journey to find the answers you crave.

Table of Contents

Is It Normal For A Dehumidifier To Blow Cold Air

It’s common for a dehumidifier to blow cold air, but it helps to reduce moisture in the air.

A dehumidifier works by pulling in humid air and passing it over cold coils, causing the moisture in the air to condense and collect in a reservoir while the dry air is released back into the room.

This process is similar to how an air conditioner works, which also cools the air by removing moisture.

So, if you notice that your dehumidifier is blowing cold air, it’s a normal operation. In fact, the colder the air, the more effective the dehumidifier is at reducing the humidity in the room.

How Hot Should The Air From A Dehumidifier Be

The air coming out of your dehumidifier should feel warm, not cold. This is because a dehumidifier removes excess moisture from the air, and warm air has a higher capacity to hold moisture than cold air.

The ideal humidity level in your home should be between 30% and 50%. When the air is too humid, it can lead to mold growth, musty odors, and even health issues.

A portable dehumidifier is a great solution to control the moisture levels in your home. By extracting moisture from the air, it helps to create a more comfortable and healthy living environment.

It’s important to note that a dehumidifier isn’t a substitute for air conditioning, as it doesn’t cool the air. Its primary function is to reduce moisture and maintain a balanced humidity level.

Why Is Your Dehumidifier Blowing Cold Air

If your dehumidifier is blowing cold air, there could be a few reasons.

One possibility is that the fan mode is activated, circling the air without removing moisture.

Another reason could be that the target humidity level has been achieved, and the dehumidifier is now maintaining the desired humidity.

The evaporator coil may also be icing up, causing the dehumidifier to enter defrost mode and blow cold air.

Fan Mode Activation

You can activate the fan mode to circulate air without the dehumidifier blowing cold air. This feature is especially useful to maintain a comfortable temperature in your space without extracting moisture. Here are four reasons why fan mode activation can be beneficial for you:

  1. Increased air circulation: The fan mode helps to distribute air evenly throughout the room, improving overall ventilation and preventing stagnant air pockets.
  2. Energy efficiency: When you only need air circulation without dehumidification, the fan mode consumes less energy than running the dehumidifier.
  3. Versatility: Fan mode activation allows you to enjoy the benefits of a portable air circulator, making it suitable for use in various settings.
  4. Reduced noise: Running the fan mode alone produces less noise than running the dehumidifier, providing a quieter activity environment.

Damaged Compressor

If your compressor is damaged, it may result in a loss of cooling capacity and require professional repair. The compressor is a vital component of a dehumidifier, responsible for compressing and circulating the refrigerant to remove moisture from the air. When the compressor is damaged, it cannot effectively compress the refrigerant, leading to a decrease in cooling capacity. This means that the dehumidifier may not be able to remove as much moisture from the air as it should. In order to ensure optimal performance and prevent further damage, it is crucial to have a damaged compressor repaired by a professional. Attempting to fix it yourself may cause more harm than good. Remember, always seek the help of a qualified technician for any compressor-related issues.

Sign of a Damaged CompressorPossible Causes
Loud or unusual noisesWorn-out bearings or faulty motor
Tripped circuit breakerElectrical malfunction or motor overload
Leaking refrigerantCracked or damaged compressor housing
Inconsistent coolingFaulty valve or damaged internal components
Excessive vibrationMisaligned motor or damaged mounting bracket

Low Ambient Temperature

When the temperature is too low, you may experience a decrease in the dehumidifier’s efficiency. This is because dehumidifiers are designed to remove moisture from the air, and when the ambient temperature drops, the air becomes less humid. As a result, the dehumidifier has to work harder to extract moisture from the air, which can lead to reduced performance.

Here are four reasons why low ambient temperature affects the dehumidifier’s efficiency:

  1. Frost buildup: At low temperatures, the moisture in the air can freeze on the evaporator coils of the dehumidifier, causing frost buildup. This restricts the airflow and reduces the dehumidifier’s effectiveness.
  2. Longer defrost cycles: When frost builds up, the dehumidifier must enter a defrost cycle to melt the ice. This can prolong the time it takes for the dehumidifier to remove moisture from the air.
  3. Energy consumption: As the dehumidifier works harder to remove moisture in low temperatures, it consumes more energy, leading to higher electricity bills.
  4. Inefficient operation: In extremely low temperatures, the dehumidifier may struggle to reach the desired humidity level, resulting in inefficient operation and inadequate moisture removal.

To optimize the efficiency of your dehumidifier in low ambient temperatures, consider these tips:

  • Place the dehumidifier in a warmer area, such as a heated room or near a heat source, to help maintain a higher ambient temperature.
  • Use a dehumidifier with a defrost function that automatically melts any frost buildup to ensure continuous operation.
  • Regularly clean and maintain the dehumidifier to prevent dust and debris from affecting performance.
  • Consider using a dehumidifier with a built-in humidistat to adjust its operation according to the desired humidity level, ensuring energy-efficient usage.

Other Potential Issues

Other potential issues that may cause your dehumidifier to blow cold air include:

  • Frozen coils
  • A malfunctioning dehumidifier
  • Activation of the fan or defrost mode
  • The presence of a desiccant dehumidifier
  • Extremely low external temperatures

These issues can disrupt the normal functioning of the dehumidifier and result in it blowing cold air instead of warm air. It’s important to address these potential issues to ensure optimal performance and efficiency of your dehumidifier.

Frozen Coils

You may notice that your dehumidifier blows cold air because the coils are frozen. This can be a common issue, especially in humid environments or if the dehumidifier isn’t properly maintained. Here are four possible reasons why the coils may be freezing:

  1. Low ambient temperature: If the surrounding air is too cold, the moisture in the air can freeze on the coils, causing them to ice up.
  2. Dirty air filter: A dirty air filter restricts airflow, leading to the coils becoming too cold and freezing.
  3. Malfunctioning defrost sensor: The defrost sensor is responsible for turning off the cooling function and activating the defrost mode. If it’s faulty, the coils may not defrost properly.
  4. Insufficient refrigerant: If there’s a leak, the dehumidifier may not have enough refrigerant to cool the coils, resulting in freezing properly.

If you experience frozen coils, it’s important to address the issue promptly to prevent further damage to your dehumidifier.

Malfunctioning Dehumidifier

If your dehumidifier is malfunctioning, it’s important to address it promptly to prevent further damage. A malfunctioning dehumidifier can lead to high humidity levels, mold growth, and potential damage to your home or belongings.

Several common issues can cause a dehumidifier to malfunction. One possible cause is a faulty compressor, which may result in the dehumidifier not effectively removing moisture from the air. Another issue could be a malfunctioning fan motor, causing the dehumidifier to blow cold air instead of warm air. Additionally, a malfunctioning control board or sensor can affect the overall performance of the dehumidifier.

It’s recommended to consult a professional technician to diagnose and repair the issue to ensure your dehumidifier functions properly and maintains optimal humidity levels in your space.

Fan or Defrost Mode Activation

When the fan or defrost mode is activated, it helps the dehumidifier remove moisture from the air in your space effectively.

Here’s how activating the fan or defrost mode can benefit you:

  1. Improved air circulation: The fan mode helps to circulate the air in your space, ensuring that all areas are covered and no moisture is left behind.
  2. Enhanced moisture removal: By activating the fan mode, the dehumidifier can extract moisture more efficiently, reducing the humidity levels in your space.
  3. Prevention of frost buildup: When the defrost mode is activated, it prevents frost from accumulating on the dehumidifier’s coils, ensuring its optimal performance.
  4. Energy efficiency: Using the fan or defrost mode when necessary can help conserve energy, as the dehumidifier works more effectively and efficiently to remove moisture from the air.

Presence of a Desiccant Dehumidifier

A desiccant dehumidifier absorbs moisture from the air, making it an effective solution for reducing humidity in your space. Unlike other types of dehumidifiers, a desiccant dehumidifier does not blow cold air. Instead, it uses a desiccant material, such as silica gel or activated carbon, to remove moisture from the air through adsorption. This process involves the desiccant material attracting and holding the water molecules, effectively drying the air. The table below summarizes the key characteristics of a desiccant dehumidifier compared to other types:

Desiccant DehumidifierRefrigerant DehumidifierPeltier Dehumidifier
Absorbs moistureCools airCools air
Does not blow cold airBlows cold airBlows cold air
Suitable for low temperaturesEfficient in moderate temperaturesNot suitable for low temperatures

Extremely Low External Temperature

To maintain optimal performance, place your desiccant dehumidifier in an area where the external temperature doesn’t drop too low. Extremely low external temperatures can impact the efficiency and effectiveness of your dehumidifier. Here are a few things to keep in mind:

  1. Ideal temperature range: The recommended temperature range for most desiccant dehumidifiers is between 40°F and 100°F (4°C to 38°C). Operating the dehumidifier within this range ensures maximum efficiency.
  2. Avoid freezing: Extremely low temperatures can cause the moisture inside the dehumidifier to freeze, leading to potential damage to the unit. It’s important to prevent freezing by keeping the dehumidifier in a climate-controlled environment.
  3. Insulation: If you live in an area with freezing temperatures, consider insulating the area where the dehumidifier is placed. This can help maintain a stable temperature and protect the unit from cold drafts.
  4. Monitoring: Regularly check the external temperature to ensure it stays within the recommended range. If the temperature drops too low, consider relocating the dehumidifier to a warmer area or using additional heating methods to keep the surroundings warm.

Impact of Dehumidifiers on Room Temperature

Maintain a comfortable indoor temperature by placing your dehumidifier in a climate-controlled environment and regularly monitoring the room temperature.

Dehumidifiers are designed to remove excess moisture from the air, not to blow cold air. While they may emit slightly cooler air due to the cooling effect of the evaporation process, this shouldn’t be the device’s primary function.

Instead, the focus should be on controlling the humidity levels in your space to prevent issues such as mold, mildew, and musty odors. To achieve this, ensure that your dehumidifier is placed in a room with a moderate temperature, ideally between 65 and 80 degrees Fahrenheit.

This will optimize its performance and help you maintain a comfortable and healthy indoor environment.

Why Does A Dehumidifier Make the Room Cold?

You may notice that your dehumidifier makes the room feel colder by removing moisture from the air. Here’s why:

  1. Dehumidifiers pull in warm, humid air and pass it over cold coils. As the air cools, water vapor condenses into liquid form, collected in a reservoir or drained away.
  2. This condensation process releases heat energy, so the air from the dehumidifier feels colder.
  3. Additionally, by reducing the moisture content in the air, the dehumidifier lowers the humidity level, making you feel more comfortable.
  4. However, it’s important to note that while a dehumidifier can make the room feel colder, it doesn’t lower the temperature. It simply removes excess moisture, creating a more pleasant environment.

Why Might A Dehumidifier Blow Cold Air Without Collecting Water?

If you notice that the dehumidifier isn’t collecting water and blowing cold air, it could be due to a malfunctioning condenser coil.

The condenser coil is responsible for removing heat and moisture from the air, and when it malfunctions, it can cause the dehumidifier to blow cold air without effectively removing humidity.

This can be a frustrating issue, as a dehumidifier’s purpose is to reduce air moisture levels.

To fix this problem, you may need to replace the condenser coil or have it repaired by a professional technician.

It’s important to address this issue promptly to ensure that your dehumidifier is functioning properly and maintaining a comfortable environment in your home.


It isn’t uncommon for a dehumidifier to emit cooler air as it works to remove excess moisture from the air.

However, if your dehumidifier blows cold air without collecting water, it may indicate a potential issue.

This could be due to various factors, such as a malfunctioning compressor or a refrigerant leak.

It’s advisable to consult a professional to diagnose and address the problem for optimal dehumidifier performance.