What To Do If Your Air Conditioner Blows Out Warm Air?

It’s the middle of summer, and you’re sitting in your home, sweating profusely, and suddenly you realize that your air conditioner is blowing out warm air. If you’re experiencing this problem, you’re not alone, especially during hot and humid weather.  Here at Evans Heating & Air, we’re dedicated to providing top-notch HVAC repairs in Glendale, CA, and we’re here to help you troubleshoot this issue.

There are steps you can take to resolve this problem:

Check Your Thermostat

First things first, check your thermostat. It might sound obvious, but the simplest solution is sometimes the best. Ensure that your thermostat is set to “cool” mode and the temperature is lower than the current room temperature. If the thermostat is not set correctly, adjust it, and wait a few minutes to see if the air from the AC unit changes temperature. If you’re having trouble with your thermostat, contact our professionals for a reliable and detailed AC repair in Glendale, CA.

Inspect The Air Filter

If the thermostat isn’t the problem, the next step is to check your air filter. A clogged or dirty air filter can cause your AC unit to blow warm air. A dirty air filter restricts airflow, causing your AC unit to work harder and longer to cool your home, which can lead to warm air coming out of the unit. A clean air filter, on the other hand, helps the AC unit function correctly and improves the indoor air quality of your home. It is recommended that you change your air filter every three months or sooner if you have pets or allergies

Ensure The Outdoor Unit Is Powered And Not Crowded

If your thermostat is working and the air filter is unclogged, but your AC unit is still blowing out warm air, it might be time to check your outdoor unit. Ensure the outdoor unit has an uninterrupted power supply. Also, remove any debris, such as leaves, branches, or dirt, from the unit and ensure that the unit has enough space around it to allow for proper airflow.

If you’ve tried all the steps mentioned, and your air conditioner is still malfunctioning, it might be time to consider a replacement. Get in touch with our professionals to schedule your AC replacement in Glendale, CA.

You can try a few more things before throwing the towel. These include:

  • Check Your Ductwork: If your ducts are located in an unconditioned space, such as an attic or crawl space, they could be exposed to the outdoor heat, which can cause them to become warm. Check your ductwork for any signs of damage, and if you find any, contact a professional to repair or replace them.
  • Clean The Evaporator Coils: The evaporator coils in your AC unit can get dirty over time, reducing its cooling capacity and causing it to blow warm air. To clean the coils, turn off the power to the unit and remove the access panel to access the coils. Then, gently clean the coils with a soft brush or fin comb. Be careful not to bend the fins.
  • Check The Refrigerant Levels: Low refrigerant levels can cause your air conditioning unit to blow warm air. If you suspect your refrigerant levels are low, contact our professional HVAC technicians to check the levels and add more if necessary.


If you’re experiencing issues with your AC unit, don’t wait until the problem worsens. Contact Evans Heating & Air today to schedule an appointment for HVAC repair. We’ll work quickly and efficiently to diagnose and fix the issue so you can enjoy a relaxed and comfortable home all year round.

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