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5 Common Household AC Unit Issues

Repairing a broken air conditioner is both expensive and inconvenient, especially when it malfunctions in the heat of summer. The best way to avoid discomfort and repair bills is to have your AC unit regularly serviced and tuned up by an experienced HVAC professional. We’ve also compiled a list of common issues that homeowners can identify or troubleshoot themselves.

If you have questions or would like to learn more about our convenient scheduled maintenance plans, call John Nugent & Sons at 703-291-1926, or contact us online today. 

Air Conditioning Issues & Troubleshooting Tips From John Nugent & Sons

  • Air Conditioner Won’t Turn On
    First, you should check your thermostat batteries and replace them if they’re dead. If your batteries are fine, or have been replaced, ensure that your thermostat is set to cooling mode. If the thermostat is on, in cooling mode, and set properly and the AC unit still isn’t turning on, check your circuit breaker. If you have a tripped breaker, reset it by flipping it off and then back on. If your AC still won’t turn on, you should call a professional.
  • AC Isn’t Producing Cold Air
    Check your air filter. If it is dirty, it might be restricting airflow and can cause your condenser to freeze up. Change your filter monthly to prevent these issues.
  • Air Conditioner Is Making Strange Sounds
  • There is a variety of sounds that your air conditioner might make that indicate different issues:

    • Hissing – This is usually caused by a refrigerant leak.
    • Clicking when AC is turned on/off – It could be a relay problem.
    • Thumping, rattling, or banging – Usually indicates an issue with the blower or motor.
    • Screeching – Is typically caused by the compressor or fan motor.
    • Buzzing – Produced by faulty electrical components.
  • Outside AC Unit Is Leaking Water
  • If your AC is leaking some water on a hot or humid day while the unit is running, it’s nothing to be concerned about. When the outside temperature is 60 degrees or lower and the AC is running, the unit might freeze up a little and leak water when it melts; this is also normal. There are, however, other reasons your outside unit might leak water that indicate a problem:

    • Air filter needs to be replaced
    • Faulty installation
    • Clogged drainpipe
    • Low coolant
    • Cracked condensate pan
  • Evaporator Coil Is Frozen
  • Your air conditioner’s evaporator coil can freeze if the unit doesn’t receive enough airflow to operate properly. Obstructed vents or ducts, a dirty air filter, or a fan malfunction are possible causes of the insufficient airflow within the system.

Why Choose John Nugent & Sons for Your AC Service?

Family-owned and -operated, John Nugent & Sons has been providing high-quality service with a personal touch to homeowners in their community since 1975. All of our HVAC professionals are experienced, licensed, bonded, and insured, and are dedicated to offering only the best products and top-notch customer service. We offer free estimates and are available for emergency AC service calls if your system is malfunctioning.

If you are in need of AC service or repair, call the experts at 703-291-1926, or you can conveniently schedule online.

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10 TIME Super Service Award Winner!

"John Nugent & Sons, I believe, is a model for a company with excellent management, superior service through cooperative scheduling and excellent service representatives."

J.A. – Leesburg, VA.

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