Why Your AC Is Blowing Warm Air

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A woman looking at the thermostat while wiping sweat from her forehead because her AC is blowing hot warm air.

Having cool air streaming into your home can be invaluable for both your physical and mental health. Science has proven that hot temperatures can be dangerous for vulnerable populations like the elderly and infants, and if you have an air conditioning system, you expect it to perform well when you need it.

Sometimes, however, you might find your AC malfunctions and starts blowing warm air instead of cool air. This can be pretty upsetting! The system is now not cooling your house, but it could be heating it.

Why do AC units sometimes start blowing warm air and what can you do about it? You can try to tackle the issue yourself using the following tips. If it all sounds too complicated or time-consuming, call a professional HVAC service technician for air conditioning service immediately to help get your system back on its feet.

Have a Technician Check Out My AC System

What Causes My Air Conditioner to Blow Warm Air?

When you find your AC blowing warm air you know something is wrong. Warm air is a sure sign your unit’s cooling system is malfunctioning. Before getting into those details of how to fix it, let’s first look at how an air conditioner works.

Your AC system pulls air from the surrounding environment using a fan. It then runs this air through a filter, passing it over an evaporator coil. This coil contains refrigerant and works by absorbing heat and moisture from the warm air, cooling it down. A few things happen in an AC system, but generally speaking, this newly-cooled air is now blown into your home, cooling the entire space.

When an AC unit is producing warm air, some element of the system isn’t working. It could be your thermostat, the evaporator coil, a leak, the presence of dirt, your compressor, loss of power, the condenser fan, or something else entirely that’s causing your problem. Getting to the bottom of the problem can take trial, error, the right tools, and some time.

Things to Look for If Your AC Is Blowing Warm Air

  • Thermostat

    • First, start with the basics. Check that your thermostat is set to the right temperature. You would be surprised to learn how many times this is the real problem.
  • Evaporator Coil

    • Next, look at your air handler and the evaporator coil. Because of the way an evaporator coil is constructed, it freezes up when heat isn’t being absorbed into it for a long time. A dirty air filter can be blocking the flow of air, stopping it from reaching the evaporator coil.

      Dirt and dust or pet hair that has accumulated on the evaporator coil can also contribute to this problem.

      You might also have some type of household object blocking the flow of air through the return vent like a piece of furniture. It’s worth checking out.While it may be tempting to try to fix it yourself, replacing or fixing your evaporator coil is a job for a skilled and certified air conditioning technician to repair properly.

  • Condenser

    • Following this, you might check your condenser – the unit outside your home. Make sure it’s running and that it’s free from dirt, debris, and grass clogging it up. You want to keep the area around your condenser unobstructed so the air can flow freely in and out of the outside unit.

Call A Trusted AC Repair Company

Hands down, the best AC maintenance is done by a qualified technician. Scott’s Heating & Air Conditioning is a leading provider of residential AC in Central Florida servicing Orlando, Winter Springs, Sanford, Longwood, Lake Mary, and many other local areas. Is your AC blowing warm air? Get it fixed! Contact our skilled team of technicians to schedule an appointment and get back to comfort.

  
 

Scott’s Heating & Air Conditioning is a full-service heating and air conditioning company and a Bryant® Factory Authorized Dealer in Central Florida. Whether you need repair, maintenance, or installation of a new heating or cooling system, we provide efficient, cost-effective, and professional service. When it’s hot, call Scott!

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AC Service Testimonials

Wonderful team of professionals. Everything was first rate, the installers were excellent .
Scott's Heating & Air Conditioning is one of the very best companies that I have ever dealt with. Each and every employee is very knowledgeable, polite, effecient, and responds quickly to each task. The products and prices are reasonable, and quality is excellent. I highly recommend Scott's Heating & Air Conditioning!
Caca B
Caca B
1694554459
Great crew; on time, knowledgeable and professional. Excellent installation of new system.
Linda Baker
Linda Baker
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Very happy with their work
Eric Garms
Eric Garms
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Oh my god what an amazing company! I literally called one hour ago and said that my thermostat wasn’t working and there was a knock on my door within the hour! They told us what to do to fix it therefore saving us a $600 bill. They came right away, none of that we can see you in 48 hour junk. Amazing.
V Js
V Js
1693328507
They were able to provide me with same day service, friendly and very responsive. Also, I got 2 other quotes and the pricing was the most competitive.
So thankful and impressed! My dad returned home after having open heart surgery to a completely dead HVAC system in the middle of summer. Definitely not ideal. The repair was going to be pricey so he opted for a new unit. A crew came out on a Saturday and did a very clean and efficient install. Highly recommend this company!!!
Brooke Riley
Brooke Riley
1692362381
Very professional, work very neat and cleaned up and removed stuff. Very impressed with all of the staff and the company.
Our AC decided to quit during one of the hottest heatwaves in years. We called Scott's and someone was at the house to give us a quote in 30 min. From the moment they answered our first phone call through the install everyone was amazing, professional and provided a quality product and excellent service. Craig, Jose, Dexter were awesome! One of the new guys brought us a portable unit at 9:30 PM on a Friday so we could sleep. We missed his name, but shout out to him as well (he likes to give high fives). Thanks Scott and team for everything. We highly recommend!!!
K Harper
K Harper
1692132893
For the past week I've worked with Craig on getting estimates for a new A/C unit, and he has been great at answering my questions and addressing any concerns. Very responsive and knowledgeable, straight shooter and direct! I didn't have to deal with any up-selling like working with a used car salesman (I experienced that with other bigger local A/C companies providing quotes). For these qualities alone I would recommend Scott's A/C, even though I will disclose that we ultimately went with another quote from a family referral of an A/C company. Had that family referral not been apart of our consideration, we would definitely choose and recommend Scott's for new A/C installs and service!
rwoodunder
rwoodunder
1691677447
Dan in sales, outstanding jobgoing over equipment and helping us make what was the best decisions for us on purchasing new a/cinstall, plus scheduling the next day!Boris and Justin were excellent with communications while install and after! very clean, professional taking old out and installing new!ty
T F
T F
1690829348
We can't thank Scott's enough. We came home to a air conditioner barely limping along. I called Scott's first thing in the morning and they had a technician out that day. Unfortunately our system could not be saved. The salesman Craig came out that day as well and quoted a new system. Since it was a Friday we could not get the system installed until Tuesday. Scott's provided us with a portable system which definitely helped during the grueling heat wave in Central Florida. Tuesday came, the installers showed up on time and did an awesome installation job. Cleaned everything up and went on their way. Everyone was pleasant, professional and great to work with! Thank You Scott's Heating & Cooling!
Rodger Marty
Rodger Marty
1689943584
Always happy with their response time. Issue started last night causing our A/C unit to shut down. Made a call to Scott's Heating and Air in the morning and a tech was here by 10:45am. Tyrie, the tech, is awesome. He quickly took care of the problem and had us up and running in no time at all. He is knowledgeable and professional and did a great job.
Perfect company to do business with. Professional and courteous in all phases of project.
Ron Brenton
Ron Brenton
1689684296
Excellent response and service. After 25 years of being serviced by a competitor I decided to change companies. AC was out and in need of replacement. Within 24 hours we had the sales rep here and new unit going in for a reasonable expense. No upselling, phony money savings, or timeshare presentations- just a new system without being targeted and pressured into pricey newer technology that will also become obsolete and non reparable every system cycle. I’m recommending to everyone looking for a new provider
Bill Sumner
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1688123609
Excellent job getting my new system installed. Friendly and professional staff. Would recommend this company to anyone who needs ac work done.
Michael Imlay
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My a/c went out on a Sunday during a holiday weekend. I called and they had someone out there within a couple of hours to repair it! Great service
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1685582464
All are very responsive and professional! Great job!
Diane Layton
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Scott’s saved the day for us this evening. Our A/C stopped working and it got hot inside quickly, which was more complicated because I’m 36 weeks pregnant. Scott’s was responsive to our call and within two hours someone had come and fixed our unit!
Kaley Gilford
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1681601593
20 out of 10 this place is amazing. The techs are always awesome. Super knowledgeable, friendly, polite and quick. They are prompt about appointments and always show up within the time frame. They always keep me cool and I cannot appreciate you guys enough!
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