Black labrador dog exhausted by the heat lying on kitchen tile in summer while air conditioner is not cooling.

Air Conditioner Not Cooling? Here’s What To Do Now

The scorching heat of summer can be frustrating, especially when your air conditioner fails to provide relief from the soaring temperatures. Air conditioners keep our homes comfortable and cool. So when your air conditioner stops cooling, it can be a serious problem.

In this blog post, we will explore some common basic fixes that can be tried before considering the need to contact a professional.

Before we dive in, you need to understand that certain issues would require you to hire an expert HVAC technician. As you troubleshoot your air conditioner not cooling, prioritize safety. If, for any reason, you feel uneasy or unsure, talk to a professional to avoid any problems. 

Let’s look at some common remedies that can help you restore your air conditioner in case of any fault.

Common Basic Fixes for Your Air Conditioning Systems

Make Sure There Is Proper Air Flow

Start by examining the air filter in the indoor air handler unit or the return air grille. A dirty air filter can restrict airflow and cause the evaporator coil to freeze, blowing warm air from the vents.

Next, inspect the air ducts for obstructions or blockages that may impede airflow. Blocked air flow can prevent the cool air from reaching all areas of your home.

Clean the Outdoor Unit

The outdoor condenser unit plays a vital role in cooling by drawing heat energy from inside your home and releasing it outside. Over time, the condenser coil may accumulate dirt, debris, and even leaves. Clean the outdoor unit by carefully removing debris, using a soft brush or a garden hose on a gentle setting, and being careful not to bend or harm the air conditioner fins.

Additionally, check the condenser fan for any obstructions and ensure it runs smoothly. Restricted airflow or a malfunctioning condenser fan can lead to poor performance and your air conditioner not cooling properly.

Verify the Power Supply

If the air conditioning unit is powered on, pay attention to any unusual sounds from the compressor. Uncommon noises can be a sign of compressor malfunctions. It is advisable to seek the assistance of an HVAC professional with expertise in this area.

Inspect the Refrigerant Levels

Refrigerant is a crucial component of the cooling process in your AC unit. It is responsible for absorbing heat energy from the indoor air and transferring it outside, allowing cool air to circulate indoors. If your air conditioner is low on refrigerant, it may struggle to cool the air effectively or may not cool it at all.

Locate the Indoor and Outdoor Components

your AC system. The indoor unit usually includes the evaporator coil and the air filter, while the outdoor unit contains the condenser coil and the fan.

Turn Off the Power

Start by turning off the power to your air conditioner. Then, remove the access panel from the indoor unit and locate the evaporator coil. Check for any signs of frost or ice formation on the coil. A frozen evaporator coil could be an indication of low refrigerant levels.

Check the Lines

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Check the Condenser Coil

Next, move to the outdoor condenser unit and visually inspect the condenser coil. Ensure the condenser coil is clean and clear of debris, as a congested coil can impact refrigerant levels.

If you have any suspicions of a refrigerant leak, it is crucial to contact a professional HVAC technician for assistance. Refrigerant leaks affect the AC system. Repairing them safely also necessitates specialized equipment and expertise.

Hand adjusting an air conditioning and heating thermostat located on a white wall.

When Should You Contact a Professional?

You should contact a professional when you experience the following with your AC system:

Frequent Breakdowns

If you encounter frequent breakdowns or major malfunctions with your air conditioning system, it clearly indicates that underlying issues may require professional attention. These issues could range from compressor malfunctions to system electrical components problems. Attempting to fix complex electrical issues without proper knowledge and expertise can lead to potential hazards or further damage to your AC unit.

Air Conditioner Not Cooling Consistently

Additionally, if your air conditioner consistently fails to cool the air despite attempting basic fixes, it is a sign that there may be a more significant problem at hand. This could include issues like refrigerant leaks, clogged condenser coils, or problems with the indoor evaporator coil. These complex issues require professional diagnosis and repair to ensure the system functions optimally.

Warm Indoor Air Instead of Cold Air

If you notice warm indoor air or your air conditioner is blowing warm air instead of cold air, it could indicate a serious problem that requires professional attention. Issues with refrigerant levels, faulty compressors, or malfunctioning heat pumps are some potential causes of this problem.

By contacting a professional HVAC company, you can have peace of mind knowing that an expert will thoroughly inspect and diagnose the issue with your air conditioning system. They have the knowledge, experience, and tools to handle complex issues safely and effectively, ensuring your AC unit is properly repaired and functioning.

The Importance of Regular AC Maintenance Service Agreements

Investing in a regular maintenance service agreement for your air conditioner is highly recommended. By enrolling in this agreement, you establish a partnership with a professional HVAC company, ensuring routine maintenance and inspections for your AC system. 

Benefits include enhanced performance and energy efficiency, early problem detection, and a prolonged system lifespan. During scheduled visits, trained technicians will conduct comprehensive cleaning, lubrication, and calibration. This optimizes cooling capabilities, reduces energy consumption, and lowers utility bills. 

Proactive inspections prevent major problems, minimizing sudden breakdowns and costly repairs. Well-maintained air conditioners have longer lifespans, reducing the need for premature replacements.


When your air conditioner is not cooling, you can try several common basic fixes before contacting a professional. These include checking refrigerant levels, cleaning or replacing air filters, and ensuring adequate airflow. However, if the issue persists or if you encounter complex or electrical problems, it is best to seek the expertise of a qualified HVAC technician. Regular maintenance and professional care are vital for your air conditioning system’s optimal performance and efficiency.

If your air conditioner isn’t cooling, don’t wait! Contact Tom’s Air Conditioning today. We will get your air conditioner back up and running in no time.