Why Your AC Runs but Doesn’t Cool Properly

Clogged Air Filter

Over time, dirt, dust, and other debris can build up in your air filter, preventing proper air circulation throughout your home. Additionally, a clogged air filter makes the AC work harder to cool your home, significantly increasing your energy bills or causing the system to shut off when you need it the most. If you notice weak airflow from vents, dust collecting quickly around your home, or unusually high utility bills, it may be time to replace your air filter. Professionals recommend replacing air filters every 2 to 3 months, depending on air quality and use.

Blocked Vents or Ducts

If the cool air is not reaching certain rooms, your return ducts or vents may be blocked. This usually happens when rugs, furniture, or other items obstruct airflow, or when debris accumulates inside the ductwork. The most obvious signs of blockage include uneven temperature throughout your indoor spaces, low airflow even when the system is running, and visible dust blowing from vents. Check all the vents to ensure they are not obstructed and schedule professional duct cleaning to prevent costly damage.

A Dirty or Covered Outdoor Unit

The outdoor AC unit in your home is responsible for removing heat from indoor spaces. If it clogs with grass, leaves, or dirt, the system works inefficiently and your home remains warm. Common indicators of buildup in your outdoor air conditioner unit include a constantly running system, warm air blowing indoors, and visible clogs or hot to the touch. The most effective way to maintain a clog-free outdoor system is to clean at least 2 feet of space and rinse the coil gently with a hose. In the case of seasonal inspections or thorough cleaning, hire a trusted HVAC company to provide comprehensive services.

A Frozen Evaporator Coil

The evaporator coil pulls heat from your indoor spaces. However, low airflow or refrigerant issues can cause the coil to freeze, affecting your AC’s ability to cool properly. Regularly check for ice on refrigerant lines or around the unit and puddles forming under the indoor unit. Additionally, reduced airflow or warmer air than expected could indicate a frozen evaporator coil. Shut off your AC and allow it to thaw completely. It is crucial to contact a professional for diagnostics and refrigerant level testing, ensuring optimal performance and reliability.

Schedule a Professional Tune-Up

As a property owner, investing in professional inspections is crucial to ensure all the components remain in top shape. Contact Aire Serv to book an appointment with our technicians and enjoy a functional and comfortable home year-round.