Why Is Your Air Conditioning/AC Blowing Hot Air?

When battling hot summer days, you need a properly working air conditioning system to keep your spaces cool and comfortable. What if you come home after a hectic day and your house is warm? You go to your nearby AC supply vent, but your air conditioning blows hot air.

A malfunctioning AC on hot summer days can be frustrating, but you’re not alone. Every summer, homeowners across every city’s state face the same problem. To save you from this challenging situation, we are here to tell you why your AC is blowing hot air.

AC blowing hot air

Common Reasons Why Your AC Blowing Hot Air

The following problems can make your AC blow hot air instead of dispersing the cold air that you’ve been craving:

  •         Thermostat Malfunction

The thermostat plays a significant role in maintaining a comfortable temperature in your home. If your thermostat is not set correctly or maintained, it can cause your air conditioner to blow warm air. Your thermostat may be set to “Heat.” Change that setting to “Cool” if you want your AC to blow cool air.

You also need to check if the settings of your thermostat fan are not set to “On.” You might think your thermostat fans are set to “ON” on a hot day, but that’s not right!

If your thermostat fan is on, it will blow out hot air when your air conditioner takes a break. You need your thermostat’s fan settings switched to “Auto” to blow only cool air.

  •         Frozen AC Coil

A frozen AC coil can also be the culprit for your AC blowing hot air. If the heat is not adequately absorbed into the coils for a certain period, it freezes due to the chemical properties of the refrigerant. Collapsed air ducts and dirty evaporator coils can result in frozen AC coils.

It’s crucial to ensure your evaporator coils’ proper maintenance and cleanliness to prevent your AC from dispersing hot air. Schedule your annual air conditioning tune-up with Diamond Air Design to get your unit cleaned and ready to cool down your home.

  •         Refrigerant Leak

A refrigerant leak can also cause your cooling unit to disperse hot air. The low refrigerant levels will expand the chemical liquid, allowing it to escape the refrigerant line through a leak. Once your AC coils have frozen, your cooling system can’t extract the warm air from your home, simply sending it back unconditioned.

  •         Compressor Failure

The compressor is an essential part of your cooling system that circulates the refrigerant around your HVAC unit. An outdated compressor pulls more and more electricity, eventually tipping your breaker. Compressor failure can also cause the contaminants to settle in the closed-loop system, blocking the refrigerant from its normal function.

Prevent Your AC From Blowing Hot Air

Changing air filters is an essential thing you can do to prevent your cooling system from blowing warm air. Also, check your unit’s compressor, refrigerant levels, thermostat, and fuse box to catch the problem. You can get help from a professional HVAC contractor-Diamond Air Design, to prevent your AC from blowing hot air in the future.

Let’s Get Started. Ready to speak with an expert?

Richard Orlando
Richard Orlando
December 29, 2022
Professional all the way! Hunter is the man and I would recommend this company to anyone.
S Reyes
S Reyes
December 15, 2022
Great family owned business. They show up when they say they will and do great work!
Michael C
Michael C
September 30, 2022
I engaged Diamond Air Design to replace two heat pump systems at my residence. From my initial contact to the completion of the project, I received nothing but the highest level of professional service. Brandon and his installation team did meticulous work, completing the project on time and exactly as promised. Diamond Air is a family-owned business with a sterling reputation. From my experience I understand exactly how they attained and why they deserve that reputation. Highly recommended.
Dennis Wilson
Dennis Wilson
September 19, 2022
Excellent installation of thermostat and HVAC unit and ‘fine-tuning’ the unit. Technician very courteous and informative.
Myda Young
Myda Young
September 7, 2022
This is one of the 3 companies I had out to my house. I’m very happy Diamond Air was one I contacted. They offered exactly what I needed, did not upsell me and were right on target on what would solve my issue. Preston, my Service Tech, was ready to answer my questions, was super knowledgeable, professional and just a charm beaming with honesty, kindness and all I could pray for in a service tech. You will not be disappointed putting your A/C equipment in their hands! Thank you Diamond Air Team! You have my business.
DarinJon Christopher
DarinJon Christopher
September 6, 2022
Just another Professional service from Diamond Air Design. We started using this company when Brandon was just starting his business and learning from his dad. His Mom was in the office and we loved it was family assisting other families whom needed help. Preston the young gentleman who came today was very professional and a service tech who explained everything as I like to know what's going on with my equipment.Thank you Sir and I hope you continue to make your career with Brandon's team as you continue to learn. Thanks again Diamond
Ronald Specker
Ronald Specker
August 11, 2022
I had an American Standard Platinum HVAC System installed. Brandon, Stewart, and Preston did the install work. They were scheduled to start at 8:00 am. Stewart arrived at 7:45 am and immediately went to work. Brandon and Preston arrived at 8:00 am with the new HVAC System. I tried to offer them drinks and something to eat but they were more concerned with completing the job. The crew was absolutely fantastic. They completed the install work in about 7 hours. They never stopped working until the job was completely finished. They did an outstanding job installing the new system. The company even filed my warranty paper work for me. I had to do nothing but sit back at let them do all the work, from the install, warranty registration, and setting up the county inspection. They even provided financing for 0% interest rate for 60 months. I would ABSOLUTELY recommend Daimond Air Design for HVAC System Replacement!!!

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