Why Is My AC Blowing Warm Air?

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Air conditioning provides welcome relief during the heat and humidity of a Beaufort, SC summer—but only if it blows cold air. If your AC is malfunctioning or in need of replacement it may exhibit a variety of symptoms that can affect the efficiency and performance of the unit, including blowing warm air. Read on to learn why this phenomenon occurs and the steps you can take to resolve the issue, courtesy of the experts at Beaufort Air Conditioning & Heating.

Common Reasons Your AC Is Blowing Warm Air

Your AC rarely breaks down without warning, and if you know what to look for you can help to prevent further damage to the unit and save money on the cost of a major repair. One of the most obvious signs that something is amiss and you may be in need of AC repair or maintenance is warm air blowing from your vents. Here are some of the most likely causes, and what you can do to restore comfort and efficiency to your Beaufort-area home.

Incorrect Thermostat Setting

While this may seem like an obvious issue, check to ensure your thermostat is set to “COOL” rather than “HEAT.” Whether you forgot to switch modes after the change of seasons or a family member inadvertently switched it back, a few simple adjustments to your thermostat may resolve the problem:

  • Set the system to “COOL”
  • Set the fan to “AUTO”
  • Ensure the temperature is set at least five degrees below the current room temperature.

Dirty Air Filter

A clogged air filter can wreak havoc on your HVAC system and should be changed every four to six weeks during peak cooling season. If your air filter is past due for a replacement it will be unable to prevent dust, pollen, mold, and other harmful particulates from recirculating throughout your indoor air and allow them to settle on the components of your AC. In addition to placing unnecessary stress on the appliance, a dirty filter can shorten the life span of your equipment, reduce the quality of your indoor air, and hamper airflow.

Inadequate Refrigerant Charge

A refrigerant leak or improper charge can prevent your AC from cooling your home. Refrigerant is a vital component in the cooling process and a lack of this liquid is the most common cause for an AC blowing warm air. Our skilled technicians will inspect the system to determine the cause of the low refrigerant level and make the necessary adjustments or repairs to restore functionality.

Leaky Air Ducts

Any part of your ductwork that has become damaged or disconnected can disrupt the cooling process and lead to a change in the temperature of the distributed air. Perform a visual inspection of exposed ductwork to see if any areas need repair, or enlist the services of a professional to inspect ductwork hidden in the attic, ceiling, or walls.

Dirty or Obstructed Condenser Unit

Annual AC maintenance, including cleaning, and regular maintenance throughout the year is needed to optimize AC performance. If your AC is blowing warm air, check the outdoor condenser to ensure the area surrounding it is free from foliage, leaves, debris, or tall grass, and that there is nothing interfering with the operation of the unit.

Schedule AC Repair, Maintenance, or Replacement in Beaufort, SC

For over 30 years, the experienced professionals at Beaufort Air Conditioning have been providing top-quality HVAC products and services to homeowners in and around the Beaufort, SC area. Call us at (843) 524-0996 to schedule fast, reliable AC services or contact us online today! 

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