AC running but not cooling? Learn the common causes and how The Dukes of Air can help restore comfort in your Arizona home.
Why Is My AC Running But Not Cooling?
In the Arizona heat, a working air conditioner isn’t a luxury, it’s a necessity. So when your AC is running but not cooling the house, it’s more than just annoying, it’s urgent. At The Dukes of Air, we’ve helped thousands of homeowners across Mesa, Gilbert, Chandler, and the entire East Valley get their systems back in working order fast. Here are the most common reasons your air conditioner may be blowing warm air and what to do about it.
1. Dirty Air Filter
A clogged air filter restricts airflow and can cause your AC to struggle, even though the system is technically on. This is one of the simplest issues to fix and also one of the most common problems we see. Learn more about air filter maintenance from the U.S. Department of Energy.
Solution: Check your filter monthly and replace it at least every 1–3 months, especially during peak cooling season.
2. Refrigerant Leak or Low Refrigerant
If your system is low on refrigerant or has a leak, it won’t be able to remove heat from the air effectively. Low refrigerant can also lead to frozen coils and other damage if left untreated.
Solution: This is a job for a licensed HVAC technician. Our team at The Dukes of Air can inspect the system, locate the leak, and recharge the refrigerant properly.
3. Dirty or Blocked Condenser Coils
The outdoor unit of your AC system can get coated in dirt, dust, or even leaves. When the condenser coils are blocked, heat can’t be released efficiently so your AC blows warm air.
Solution: Regular AC maintenance includes cleaning the outdoor unit. If it’s been a while, call us to get things cleared and tuned up.
4. Thermostat Issues
Sometimes the fix is simpler than you think. If the thermostat is set incorrectly or malfunctioning, your system might not be sending the right signals to cool your home.
Solution: Make sure your thermostat is set to “cool” and check the temperature setting. If your thermostat is old or unresponsive, it may need to be replaced.
5. Frozen Evaporator Coils
If the evaporator coils inside your indoor unit freeze up, they can’t absorb heat from the air. Ironically, this can result in your AC blowing warm air or none at all.
Solution: Turn off your system and call a professional. Running your system with frozen coils can lead to compressor damage.
6. Leaky Ductwork
In many Arizona homes, ductwork runs through hot attics. If there are leaks in your ducts, cooled air may be escaping before it reaches your living space.
Solution: Duct inspection and sealing can significantly improve system performance and lower your energy bills.
Need AC Repair in Mesa, AZ or the East Valley?
If your AC is running but not cooling, don’t wait. Arizona temperatures can rise fast, and a struggling air conditioner may completely shut down if the issue isn’t resolved. The Dukes of Air offers fast, reliable AC repair services throughout Mesa, Chandler, Gilbert, Queen Creek, Apache Junction, and nearby communities.
Our licensed technicians are trained to diagnose and repair all makes and models, and we offer upfront pricing with no surprise fees.
Call The Dukes of Air Today
Whether it’s a minor fix or a major repair, our team is ready to help restore comfort to your home. We also offer preventive AC maintenance plans to help keep your system running efficiently all summer long.
Call now 480-571-0974 or schedule service online to get your cooling back on track.
