Why is Your Air Conditioner Blowing Warm Air?

Why is Your Air Conditioner Blowing Warm Air?

It’s incredibly frustrating when you can’t get cool on a hot day even though your air conditioner appears to be working. You check the thermostat and discover the temperature is above the desired level. When you place your hand over one of the AC vents, you find that warm air is emitted. It is always best to contact air conditioning repair in Peoria, AZ.

Reasons Why Your Air Conditioner’s Has a Warm Air Output:

  • Condensate Path is Clogged:

During your air conditioner’s heating and cooling process, a great deal of condensation is produced. The condensate line is responsible for transporting this moisture outside, typically through an exterior wall. Because the environment of the drain line is constantly moist, it is typical for mold or even algae to grow. When the pipe is clogged, the ability of your air conditioning system to remove humid air is hindered, causing warm air to circulate throughout your home.

  • Polluted Air Filters:

A dirty air filter is another common cause of an air conditioner emitting hot air. Dirty air filters cause airflow issues throughout the system and cause the fan motor to overheat. Additionally, they increase energy consumption because they force your HVAC system to operate at a higher power setting. Check for dirty air filters if your air conditioner is emitting warm air.

Typically, a visual inspection is sufficient to determine whether or not your air filters are dirty. Remove and hold up the air filters. If they are transparent, your air filters are clean. If they are obstructed by dirt, they must be cleaned or replaced.

  • Incorrectly Calibrated Temperature Control:

Occasionally, your air conditioner emits hot air due to improper settings. For example, if your blower fan is set to ON, it blows air continuously, even when the system is not cooling. Consequently, it emits warm air between cooling cycles. Alternatively, you may have inadvertently set your air conditioner to heat mode. Check whether the setpoint is excessively high. Another possibility is that your thermostat’s calibration is incorrect, preventing you from setting the desired room temperature. Check the batteries in your thermostat and intelligent AC controller as well.

  • Refrigerant Leak:

Refrigerant is the fluid within an air conditioner that absorbs heat from the air and cools the space. If your unit has a refrigerant leak, its cooling agent will deplete. Consequently, the remaining refrigerant fluid may not be sufficient to cool the room. Low levels of refrigerant fluid can also cause your air conditioner to blow hot air. 

If your AC is not cooling correctly, one of the first things to check is for a refrigerant leak. Examining the evaporator and condenser coils can identify a refrigerant leak. They must be cold to the touch without being frozen. Also indicative of a refrigerant leak are hissing sounds and unexpectedly high energy bills. You must reach the best HVAC companies to solve issues related to a refrigerant leak.

  • Frozen Evaporator Coils:

Condensation occurs when the evaporator coil removes heat from the air to cool the space. Air conditioners utilize a condensate drain to remove this moisture from the system. When excessive water accumulates on the evaporator coil, it can freeze. A frozen evaporator coil impedes heat transfer, resulting in your home’s air conditioner emitting warm air.


If your air conditioner is warming, contact KJ’s cooling and heating for air conditioning repair. We are amongst the best HVAC companies in Phoenix