5 Reasons Why Your AC Is Blowing Warm Air

If your AC struggles to keep your house cool, check the air blowing from the vents. A malfunction may have affected the unit’s cooling ability, causing it to blow warm air and preventing it from effectively cooling your space.

Your next question may be: “Why is my AC blowing warm air?” Several issues can lead to this effect. Explore a few potential reasons, then contact Eazy Breezy Heating & Cooling for an inspection and AC repair.

1. Low Refrigerant in the Unit

Your HVAC system uses refrigerant to cool the air entering the system. When your system has low refrigerant, it may not be able to cool the air effectively, leading to warm air blowing from the vents. You might also notice other symptoms of low refrigerant:

• Hissing or bubbling noises when the AC is running
• Water pooling around the air handler
• Ice building on the evaporator coil

The most common cause of low refrigerant is a leak. A professional will need to assess the problem and recharge the system.

2. Dirty or Clogged Air Filters

A dirty air filter can also impact your unit’s ability to disperse cool air throughout your home. Air must pass through the filter before it reaches the air ducts. When the filter is overly dirty or clogged, the system must work harder, impeding its cooling ability.

The fix for this issue is simple: replace the air filter. Then set a reminder to change the filters every one to three months, depending on usage.

3. Frozen Evaporator Coils

Low refrigerant and dirty air filters can both lead to another problem that causes your AC to blow warm air: frozen evaporator coils. These coils absorb heat from the air and use refrigerant to cool it before recirculating it throughout your home. They may freeze when they receive poor airflow or when the refrigerant pressure drops too low, such as what happens during a leak.

An HVAC professional will inspect your evaporator coils and the system as a whole, then mitigate the issue that caused them to freeze.

4. Incorrect Thermostat Setting

Sometimes, air conditioner problems arise due to incorrect thermostat settings. Check your thermostat to ensure that you have the “cool” setting on, rather than “warm” or “fan.” This prompts the AC to turn on rather than the HVAC system simply circulating room-temperature or warm air throughout your home.

Also, ensure that you have the temperature set to your preferences.

5. Tripped Breaker or Loss of Power

Another common cause of an AC blowing warm air is a loss of power to the unit. Check that any switches near the HVAC unit are on and that the breaker switch powering the outdoor unit has not tripped. These electrical issues could lead your HVAC system to circulate air without actually engaging the AC unit.

When in Doubt, Call Eazy Breezy Heating & Cooling

If you’re asking, “Why is my AC blowing warm air?” our professionals can give you a specific answer. Call Eazy Breezy Heating & Cooling at 520-207-0334 to request a repair or schedule summer HVAC maintenance to prevent future malfunctions.