It is incredibly frustrating when your air conditioner starts blowing warm air, especially during the peak of an Arizona summer. Instead of cooling your home, your system seems to be circulating the heat. We understand the urgency of this situation. Here are the four most common reasons why this happens.
Incorrect Thermostat Settings
Sometimes the simplest explanation is the right one. If your thermostat is set to “fan” instead of “cool,” the system circulates unconditioned air. Double-check your settings to ensure the switch is on “cool” and the fan is set to “auto.” This minor adjustment often solves the issue without professional AC service.
Clogged or Dirty Air Filters
A filthy air filter restricts airflow, causing your evaporator coils to freeze over. When this happens, the air cannot cool down properly, resulting in warm airflow. We recommend checking your filters monthly. Regular changes are a critical part of AC maintenance that keeps your system efficient and your home comfortable.
Low Refrigerant Levels
Your air conditioner relies on refrigerant to absorb heat from your home. If there is a leak, the system cannot cool the air effectively. You might notice ice on the refrigerant lines or a hissing sound. This requires immediate AC repair, as handling refrigerant is dangerous and requires certified technicians.
Dirty Outdoor Condenser Unit
Your outdoor unit releases the heat absorbed from inside your home. If the coils are covered in dirt, leaves, or debris, the heat remains trapped in the system. This forces the unit to work harder and blow warm air. Scheduling routine AC service ensures these components remain clean and functional.
Blowing warm air is stressful, but identifying the problem is the first step toward a solution. Whether it is a simple filter change or a complex refrigerant leak, our team at Aristotle Air is here to restore your comfort. Contact us today to schedule your expert AC repair or maintenance service.