A Haier air conditioning unit might not provide effective cooling for several reasons. These include being too small for the space it's trying to cool, not having sufficient clearance for proper airflow, operating in an incorrect mode, having a thermostat set at too high a temperature, or having dirty filters or coils.

In addition, cooling issues could stem from problems such as air leaks, blockages within the unit, obstructions or excessively long hoses, insufficient refrigerant, or the presence of a malfunctioning remote control or component.

Why Is My Haier Air Conditioner Not Cooling?

1. Undersized Unit (AC Capacity Too Small)

When it comes to your Haier air conditioner, it's crucial that it's appropriately sized for your room. If it's too small, it won't have the capacity to effectively cool your space, and even if it manages to cool it somewhat, you might not feel the cooling effect.

Therefore, before jumping to conclusions about your AC's performance, it's essential to verify its cooling capacity.


If your air conditioner is indeed too small for your space, you should consider replacing it.

2. Inadequate Clearance

Proper clearance around your air conditioner is essential to ensure optimal airflow. When the unit is positioned too close to a wall, it can result in inadequate cooling performance. Even if it manages to cool, it won't do so effectively.


To rectify this issue, simply move the air conditioner away from the wall to create the necessary clearance space around it. This will help improve its cooling efficiency.

3. Incorrect Mode Selection

To achieve cold air with your Haier air conditioner, it's important to ensure you have selected the appropriate mode. Cool Mode is the setting you should choose for effective cooling. Other modes, such as Dry Mode, Fan Mode, and Heat Mode, are not designed to provide cooling.

For instance, Dry Mode is intended for dehumidification, Fan Mode promotes air circulation but doesn't necessarily provide cold air, and Heat Mode is designed for heating.


If your air conditioner is set to any mode other than Cool Mode and you desire cold air, simply switch it to Cool Mode to enjoy the cooling effect.

4. Elevated Thermostat Setting

To ensure your air conditioner effectively cools your space, it's important to set the thermostat to a lower temperature, typically below 75°F (24°C).

When the thermostat is set higher than this temperature, the air conditioner will blow out warmer air, which is not what you want for cooling purposes.


If your thermostat is currently set higher than 75°F, you should lower the thermostat's setting to achieve the desired cooling effect.

5. Clogged Air Filter

As time passes, the air filter in your air conditioner can become clogged with dirt and debris. This blockage can impede the flow of air, causing your air conditioner to be less effective in cooling your space. In fact, it may even result in the indoor air becoming warmer rather than cooler.


To address this issue, inspect your air conditioner's air filter for any signs of dirt buildup. If you find that it is indeed dirty, clean the filter to remove the accumulated debris. Haier recommends performing this maintenance task on a weekly basis or, at the very least, monthly, to ensure optimal performance.

Pros and Cons of Haier Air Conditioner


  • Affordability
  • Energy Efficiency
  • Compact and Portable Options
  • Innovative Features
  • Quiet Operation


  • Durability
  • Cooling Capacity
  • Limited Warranty
  • Noise Levels

Differences Between Haier Air Conditioners and Amana Refrigerators

Haier Air Conditioners

These appliances are designed to remove heat from indoor spaces, providing a cooler and more comfortable environment during hot weather.

Amana Refrigerators

Amana refrigerators are used to keep food and beverages cold, preventing spoilage and extending the shelf life of perishable items.

Alternative to haier air conditioner

LG Air Conditioners

LG offers a wide range of air conditioning units known for their energy efficiency and innovative features. They produce window AC units, split systems, and portable air conditioners.

Haier Portable Air Conditioner Not Cooling

Various factors can contribute to a Haier portable air conditioner not cooling as expected. These potential reasons include:

  1. Undersized Unit: The air conditioner may be too small for the space it's trying to cool.
  2. Inadequate Clearance: Insufficient clearance around the air conditioner can hinder proper air circulation.
  3. High-Temperature Setting: The thermostat may be set too high (above 75°F), or the wrong operating mode may be selected instead of the 'Cool Mode.'
  4. Air Leakage: Cold air may be escaping outdoors, or warm air could be entering through gaps around the unit.
  5. Low Refrigerant Level: The refrigerant level might have dropped, possibly due to a leakage in the system.
  6. Lengthy or Kinked Exhaust Hose: If the exhaust hose is excessively long (over 5 feet) or kinked, it can affect the unit's cooling efficiency.

Haier Window Air Conditioner Not Cooling

When dealing with a non-cooling Haier window air conditioner, several potential issues could be at play. These factors may include:

  1. Incorrect Mode Selection: Ensure the air conditioner is set to 'Cool Mode' to enable cooling.
  2. Elevated Thermostat Setting: Verify that the thermostat is set below 75°F for cooling.
  3. Inadequate Unit Size: Make sure the air conditioner is appropriately sized for the space; if it's too small, it may struggle to cool effectively.
  4. Outdoor Obstructions: Check for blockages caused by curtains or outdoor branches that could hinder airflow.
  5. Filthy Air Filter or Condenser Coils: A dirty air filter or clogged condenser coils can impede cooling performance.
  6. Refrigerant Leak: Low refrigerant levels due to leakage can affect cooling capacity.
  7. Faulty Components: Components such as the compressor, thermistor, run capacitor, or thermostat could be malfunctioning, hindering cooling.

How to Make Haier Air Conditioner Colder?

  1. Regular Air Filter Maintenance: Replace or clean the air filter frequently, preferably on a monthly basis, to ensure optimal airflow and cooling efficiency.
  2. Use Supplementary Fans: Install additional fans in your room to complement the air conditioner, helping to circulate cool air more effectively.
  3. Adjust Thermostat Settings: Set the thermostat to a consistently lower temperature to maintain a cooler environment.
  4. Reduce Heat Sources: Turn off or minimize the use of heat-emitting appliances like ovens, stoves, or microwaves in the vicinity to reduce heat buildup.
  5. Seal Gaps and Leaks: Seal any gaps or leaks around windows and walls to prevent warm air from entering and cool air from escaping.
  6. Clear Obstructions: Ensure there are no obstructions around the outdoor or indoor unit that might hinder airflow.
  7. Shade the Unit: Position the air conditioner away from direct sunlight to prevent it from working harder due to excess heat.
  8. Regular Maintenance: Schedule routine maintenance for your air conditioner, including cleaning coils and checking refrigerant levels, to keep it running at peak performance.


When your Haier air conditioner is not blowing cold air, it can be a frustrating and uncomfortable situation, especially during hot weather. However, understanding the various factors that can contribute to this issue, such as incorrect settings, inadequate maintenance, or external obstructions, empowers you to take the necessary steps to rectify the problem.

By ensuring proper maintenance, such as regular air filter cleaning or replacement, adjusting thermostat settings, and minimizing heat sources in the room, you can significantly improve the cooling performance of your Haier air conditioner. Additionally, addressing issues like air leaks or obstructions around the unit and providing shade for it can further enhance its efficiency.

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My name is Wisdom Bassey, I'm a blog content writer and graphic designer who provides support and services for brands and different companies. I'm young and versatile, A tech enthusiast. I carry out deep research on every topic I choose to write about. You can reach me through my social media handles, I'm always available and ready to connect.

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