What Are the Most Common AC Issues?

Air conditioners are essential for maintaining comfort during hot months, but like any appliance, they can encounter problems. Understanding the most common AC issues can help you address them before they escalate into costly repairs.

1. Refrigerant Leaks

Refrigerant is the substance that cools the air in your AC system. When there’s a leak, your AC can lose its ability to cool effectively, leading to discomfort and higher energy bills.


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Signs of a refrigerant leak include warm air blowing from the vents, ice forming on the refrigerant line, and a hissing sound. It’s crucial to have leaks repaired by a professional, as simply adding more refrigerant won’t solve the underlying problem.

2. Frozen Evaporator Coils

Evaporator coils are filled with refrigerant and are responsible for absorbing heat from the air. If the coils get too cold, they can freeze, causing your AC to stop functioning correctly. This issue is often caused by airflow problems, such as a dirty air filter or blocked ducts. If you notice ice forming on your unit, turn off your AC and contact a technician to inspect and resolve the issue.

3. Dirty or Clogged Filters

Air filters play a vital role in maintaining airflow and keeping your AC unit clean. When filters become dirty or clogged, they can restrict airflow, causing the system to work harder and potentially overheat. This can lead to higher energy bills and reduced efficiency. Regularly checking and replacing your air filters can prevent this issue and extend the life of your AC system.

4. Thermostat Problems

A malfunctioning thermostat can lead to inconsistent temperatures and discomfort. Common thermostat issues include inaccurate temperature readings, failure to turn on the AC, or the system cycling on and off frequently. These problems can often be resolved by recalibrating or replacing the thermostat. Upgrading to a programmable or smart thermostat can also enhance your system’s efficiency and control.

5. Electrical Issues

Your AC system relies on a complex network of electrical components, including capacitors, wiring, and relays. Electrical problems, such as a faulty capacitor or loose wiring, can cause your AC to fail suddenly or operate intermittently. Regular maintenance by a qualified technician can identify and address these issues before they lead to a complete system breakdown.

6. Drainage Problems

AC units remove moisture from the air, which is then drained away. If the drain line becomes clogged or the pan overflows, it can lead to water damage and even mold growth. Regularly inspecting and cleaning the drain line can prevent these issues.

Watch the video above to learn more and be sure to contact an AC company Atlantic Beach, FL and Jacksonville relies on if you notice any of these signs!

Frozen Evaporator Coils Are Common

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