Common Air Conditioner Problems

Air conditioners are essential for home comfort, but they can face several common issues. Understanding these problems and knowing how to address them can keep your system running efficiently.

Common Issues with Central Air Conditioners

  1. Disrupted Airflow:
    • Cause: Closed-off rooms disrupt airflow through the home.
    • Solution: Keep interior doors open to allow air to circulate freely.
  2. Installation and Maintenance Problems:
    • Faulty Installation: Can result in leaky ducts and low airflow.
    • Poor Service Procedures: Incorrect refrigerant charge or poor maintenance can impair efficiency.
    • Action: Hire qualified technicians for installation and regular maintenance. Ensure refrigerant levels match the manufacturer’s specifications.
  3. Checking Your System:
    • Initial Check: If the system fails, check fuses or circuit breakers. Let the unit cool for five minutes before resetting.
    • Compressor Issues: On hot days, a tripped high-pressure limit switch may stop the compressor.

Specific Problems and Solutions

Refrigerant Leaks:

  • Sign: Low refrigerant levels.
  • Cause: Undercharging at installation or leaks.
  • Solution: A trained technician should fix leaks, test the repair, and charge the system correctly. Confirm repairs before adding more refrigerant.
  • Environmental Impact: Leaks harm the environment, so ensure proper handling and disposal.
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A refrigerant leak is one common air conditioning problem. | Photo courtesy of ©iStockphoto/BanksPhotos.

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Before and After AC filters

Inadequate Maintenance

  • Dirty Filters and Coils: Can cause the system to malfunction and lead to premature compressor or fan failure.
  • Solution: Change filters regularly. Ensure filters fit securely to prevent air bypass.

Electric Control Failure

  • Cause: Frequent on/off cycling and corrosion of wires and terminals.
  • Solution: Check electrical connections and contacts during professional service calls.

Sensor Problems

  • Central Air Conditioners: Thermostats should be free from direct sunlight and obstructions to accurately monitor temperature.
  • Room Air Conditioners: Ensure the thermostat sensor behind the control panel is correctly positioned near the evaporative coil without touching it.

Drainage Problems

  • Humid Conditions: Check the condensate drain to prevent clogs and ensure proper drainage.
  • Room Air Conditioners: Must be mounted level to drain correctly.
  • Maintenance Tip: Periodically flush the drain line with bleach and water to prevent mold growth. Ensure condensate pumps are debris-free and operating properly.

For more detailed information, check out our Energy Saver 101 infographic on home cooling. Keeping your air conditioner well-maintained and addressing issues promptly will ensure it operates efficiently and effectively.

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