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Blog: Thermostat Troubleshooting

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Why Is My AC Blowing Warm Air? Troubleshooting Guide

By FL-Air Heating and Cooling on June 16, 2025

There’s nothing worse than turning on your air conditioner and feeling warm air pouring from the vents. If your AC is blowing warm air, it’s a clear sign that something isn’t working the way it should. The issue could be simple, like a thermostat setting, or it could point to a bigger problem with your…

AC Repair

Only recommended what was needed and did not take advantage like most would have done

They were a life saver when my family and I were in a pinch! We were very hesitant when calling an AC company due to having a very old unit. They were very professional, quick, and affordable. They only recommended what was needed and did not take advantage like most would have done. Thank you!

Jennifer Leporati
Source: Facebook
Super customer service that I can easily recommend everybody

Very friendly, polite, and honest service. Mark Lang gave a super customer service that I can easily recommend everybody. You won’t regret it. Give this local company a chance to improve our community. You will pay less and get a better service while you support a local company.

Ufuk Keles
Source: Facebook
The ONLY AC company I will use from now on

This is the ONLY AC company I will use from now on. Called Mark up to get a quote on a new system because my current system is a 10yr old Trane but has never worked as expected since I moved in 5 yrs ago. I’ve done bi-annual maintenance, filter changes monthly and had 3 separate AC companies provide maintenance over the 5 years with at least 6 different service techs. All said the unit was working as expected and was in good shape. I’ve never been able to keep the house in the late summer afternoon heat under 78-80 degrees. We tried to never use the oven in the summer because it would heat the house to over 80 degrees. When Mark stopped by, instead of talking price/units and what he could provide, he simply asked what was wrong and went out to check the unit. Literally within 15 minutes, he said he thought the system might be wired wrong and it wasn’t hitting the second speed. Within 1.5 hours, he re-wired the condenser, the air handler/furnace, and the thermostat. My AC is now working as designed and my home has never been more comfortable. I’m getting 58-60 degrees out of my supply vents now. Previously, I was getting 68-73 degrees. Sorry Trane, I was badmouthing your product for years because I thought it was subpar and because 3 separate companies said it was working as designed. Mark mentioned a lot of techs don’t understand the more complex design of Tranes and it needs to be done correctly right from the start. Mark, you are a life saver and your company is the only one I WILL EVER USE!

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value

Chris Amos
Source: Google

Charlie Fanning

We always have a great experience with the guys from FL-Air. Bobby took care of all our maintenance needs and discussed all the pertinent details of his findings.

Response from the owner:Hi, Charlie. We appreciate the kind words and are glad we could provide you with a positive experience!

Jake Gagne

Brandon is a pleasure to work with and very fair/reasonable with is pricing

Response from the owner:Hi, Jake. We are thrilled to learn that you had a positive experience with us!

Cary Harbaugh

Response from the owner:Hi, Cary. Thank you so much for rating your experience with us so highly!

Elaine Douglas

Brandt took his time checking the whole unit out. We are very pleased with the service he provided.

Response from the owner:Hi, Elaine. Thanks for taking the time to share your positive experience. We truly appreciate it!

George Torres

Bobby was very nice .he check every system completely with no issues. He did an excellent job .thank you bobby

Response from the owner:Hi, George. Thank you so much for leaving us a stellar review!

ladcad

Great Techs, delivering great service. Had annual check up on my newer units and all went well, as expected. Hard to beat FL Air.

Response from the owner:Hi, Ladcad. Your feedback is highly appreciated. Thank you for the review!

Michael Dermont

Mark Lang and his team were outstanding. They kept me informed throughout the entire process, answered all my questions and delivered on time. Thank you FL Air Heating & Cooling.

Response from the owner:Hi, Michael. We appreciate the kind words and are glad we could provide you with a positive experience!

Jerry Edmonds

Brandt was on time, fast, knowledgeable, and polite. Would welcome him back anytime!

Response from the owner:Hi, Jerry. Thanks for taking the time to share your positive experience. We truly appreciate it!

Bryne Bushofsky

Response from the owner:Hi, Bryne. We are delighted that you had a great experience with us. Thank you for taking the time to rate us!

Sherry Gordon

We have been using Florida Air for 5 years now they are the BEST Brandt was here today for our check up he was outstanding we wouldn’t use anyone else
Thank you

Response from the owner:Hi, Sherry. We are thrilled to learn that you had a positive experience with us!

LEE ERICKSON

In my opinion the company did a great service for me. After I have called and talked with them they sent a technician out and he was here right on time that we agreed upon. He was professional in his duties diagnosing the problem we had with our air conditioning equipment. The parts were ordered, they called and let me know the parts were in and scheduled the time for the technician to come out, the technicians was here on the agreed time. Brandon was our technician who did the diagnosed and did the work installing our parts, he worked very professional steady, and finished in a timely manner. I feel the company should be very proud of Brandon to represent their company the way he did very professional. Their prices were reasonable. I would definitely highly recommend their company. I would definitely use them in the future. I also feel that they have great service plans I would definitely recommend those also.
Lee E

Response from the owner:Hi, Lee. Thank you so much for leaving us a stellar review!

Tina Pennino

I keep using this company due to several reasons, they are always prompt either when I have a problem with a/c or when I need maintenance. Next is important to me as this is a trustworthy company that has always been honest with my a/c needs.One more thing is the technicians are the best, they explain and educate you on the a/c, companies don’t take the time for that anymore but this company does.

Response from the owner:Hi, Tina. Your feedback is highly appreciated. Thank you for the review!

Clay Fowler

Response from the owner:Hi, Clay. We appreciate the rating, and are glad we could provide you with a positive experience!

Derek Perez-Piris

Response from the owner:Hi, Derek. Your feedback is highly appreciated. Thank you so much for the review!

Steven Collins

I recently had a new A/C unit installed by FL-Air and their professionalism, knowledge, and timeliness was phenomenal. The install crew were diligent, meticulous, and helpful to my many questions. Great job. Great company.

Response from the owner:Hi, Steven. Thanks for taking the time to share your positive experience. We truly appreciate it!

Kirk “Captain Kirk” Diaz

What a great HAVAC company and service tech. This is the second time I have used them for a service call and they are so honest and efficient with their scheduling, my issue turned out to be minor one and was fixed immediately. I have since signed up for an annual service and maintenance contract which is a great deal.

Echo EliteTeam

Always the best AC company. When you have a problem with your AC and you call Florida Air, they will be there to take care of it. I will never use another AC company. If I could give 100 stars i would.

Response from the owner:Hi, Echo. Thank you so much for leaving us a stellar review!

Liping Tang

Great service!

Response from the owner:Hi, Liping. Thanks for taking the time to share your positive experience. We truly appreciate it!

Laura Rubin

Brandon B -Thoroughly went through the AC system, was courteous, and knowledgeable. would Highly recommend Brandon and this company!

Response from the owner:Hi, Laura. We are thrilled to learn that you had a positive experience with us!

Lee Muchnikoff

Brandon did a great job of providing maintenance service, as did Nate last week when air handler wiring needed to be fixed.

Anita Akers

Very efficient at installation. Friendly and informative. Reasonable price. I'd definitely recommend them.

UPDATE: My Unit "froze up" on July 4th. Left message and they called me back at 8 am the next morning. A tech arrived before 8:30. Problem found, temporary fix made, and scheduled to be back to trace the leak this week. Very pleased with the response time and looking forward to getting the leak taken care of.

11-14-2024: Friendly, efficient service.

11-22-2024: semi-annual maintenance complete.

03-26-2025: semi-annual maintenance complete. No problems.

11-17-2025: Just had my semi-annual maintenance done. As expected, no problems and service was great.

Response from the owner:Hi, Anita. We appreciate the kind words and are glad we could provide you with a positive experience!

Deborah Roscoe

Response from the owner:Hi, Deborah. Thanks for taking the time to share your positive experience. We truly appreciate it!

Nelia Bruce

Response from the owner:Hi, Nelia. We appreciate the rating, and are glad we could provide you with a positive experience!

LauraJ

It was fixed speedily and accurately.

Response from the owner:Hi, Lauraj. Thank you so much for leaving us a stellar review!

Martha Minahan

Excellent service! FL-Air is outstanding in every regard. First class service! Prompt and did the job fully.

Response from the owner:Hi, Martha. Your feedback is highly appreciated. Thank you for the review!

J Maz

FL-Air was professional, but I wish they had told me that they have no experience with the type A/C that I have Amana PTAC.

Response from the owner:Hi, J. Thanks for taking the time to share your positive experience. We truly appreciate it!

Ray Letkiewicz

EXCELLENT service.
The tech was very competent in doing the maintenance on the ac unit
He cleaned the outside unit removing the leaves that got in there
He also answered all of our questions very well regarding further service to our unit like adding the mold control feature

Response from the owner:Hi, Ray. We are thrilled to learn that you had a positive experience with us!

Lewis Lewmin

Amazing professional company and follow through, what a concept.
Great company!

Response from the owner:Hi, Lewis. Thank you so much for leaving us a stellar review!

Thomas Tonelli

As always, first class and top-notch service! Our service tech Bobby was on time as scheduled and did a very thorough regular maintenance check-up on our AC system. He gave a complete and thorough explanation of everything he did and an update on the state of our AC system.
FL-Air is outstanding! You will not find a more reputable AC company than FL-Air and it all starts with their owner, Mark Lang!

Response from the owner:Hi, Thomas. Thank you so much for leaving us a stellar review!

Bill Herk

Professional personal,knowledgeable. Responds to issues promptly.

Response from the owner:Hi, Bill. We are thrilled to learn that you had a positive experience with us!

michael coffey

Response from the owner:Hi, Michael. Thank you so much for rating your experience with us so highly!

Cathleen Sopcik

It was time for our AC maintenance check that was part of our maintenance plan. Our service man showed up on time and did a thorough maintenance check on our system! We were impressed by the prompt service and knowledgeable service personnel. We will definitely recommend them to our friends and family!

Response from the owner:Hi, Cathleen. Thanks for taking the time to share your positive experience. We truly appreciate it!

Jennifer Arata

We received excellent service and highly recommend our technician Brandt. He arrived as a scheduled, was very professional and explained his findings very clearly. We also appreciate the scheduling updates and communication from the office staff.

Response from the owner:Hi, Jennifer. We appreciate the kind words and are glad we could provide you with a positive experience!

Andreia Tashima

High quality

Response from the owner:Hi, Andreia. Thank you so much for leaving us a stellar review!

Andreia Tashima

Excellent work

Response from the owner:Hi, Andreia. Your feedback is highly appreciated. Thank you for the review!

Ken Smith

FL-Air always does a great job with anything they do. They have completed more than one job for us and they do our yearly maintenance. We are always very pleased with the results and the cost is always very reasonable. Anytime I have any heating or air conditioning needs I know who to call. I am very thankful I have found a company that does this type of work they do when I need them.

Response from the owner:Hi, Ken. We are thrilled to learn that you had a positive experience with us!

Paul Johnson

Quick, thorough, competent and cordial

Response from the owner:Hi, Paul. Thanks for taking the time to share your positive experience. We truly appreciate it!

Bulent Tekin

Great service

Response from the owner:Hi, Bulent. We appreciate the kind words and are glad we could provide you with a positive experience!

gary selby

Laerik was excellent. He was courteous,efficient’ and left my AC unit running beautifully.

Response from the owner:Hi, Gary. Thanks for taking the time to share your positive experience. We truly appreciate it!

Scott Owen

Eric was extremely knowledgeable and his diagnosis was quick. Repairs were reasonably priced and he didn't try to sell me a new AC. I would definitely use again.

Response from the owner:Hi, Scott. We are thrilled to learn that you had a positive experience with us!

Michael Hoffman

Fantastic prompt service. Brandt our service tech figured out the issue and resolved the problem quickly. Great job by Fl-Air

Response from the owner:Hi, Michael. Thank you so much for leaving us a stellar review!

Mary Ellen Kirby

Austin has now been here 2 days in a row still trying to diagnose the reason I have not had AC for almost 2 weeks in this heat. I am confused since I have had 3 companies and all 3 have different answers to that question. Austin is knowledgeable and professional. I hope is is right. More important I hope he can get me AC soon.
Now I am waiting for estimates. Hope they are within my budget

Response from the owner:Hi, Mary. Your feedback is highly appreciated. Thank you for the review!

Ashok Bhat

Today’s visit by Brandon was scheduled to check on Newly installed RHEEM 2 Ton Heat Pump in August 2025. Brandon was thorough and went over Condenser,Air handler,Duct work,Insulation in the Attic as well as Thermostat.

Response from the owner:Hi, Ashok. We appreciate the kind words and are glad we could provide you with a positive experience!

Bill Hallinan

Very accommodating, professional, and knowledgeable. It’s nice to know there are still locally owned businesses that you can trust and rely upon. Highly recommend!

Response from the owner:Hi, Bill. We are thrilled to learn that you had a positive experience with us!

Donna Stevens

Brandt did a great job of diagnosing and repairing the issue with my air conditioning, he also cleaned out the drain pipe for my air handler. He was courteous, knowledgeable, efficient, and timely. I am very pleased with FL-Air Heating and Cooling!

Response from the owner:Hi, Donna. Thanks for taking the time to share your positive experience. We truly appreciate it!

Desean D

Response from the owner:Hi, Desean. We appreciate the rating, and are glad we could provide you with a positive experience!

Chris Britt

Response from the owner:Hi, Chris. Thank you so much for rating your experience with us so highly!

Aaron Shedlock

Excellent service. Found the problem with our AC unit quickly, had the needed part in hand, did the repair and we were back in business in no time.

Response from the owner:Hi, Aaron. Thanks for taking the time to share your positive experience. We truly appreciate it!

Sherry Bradley

Bobby did a great and thorough job. He was friendly, professional, and helpful with answering questions and giving feedback. Thanks FL-Air!

Response from the owner:Hi, Sherry. We appreciate the kind words and are glad we could provide you with a positive experience!

Jerry M.

Great service by this company. Alvino was an excellent Tech. Friendly and professional. This will be my goto AC company. Keep up the great work...

Edward B.

Over the past few years, we've had an excellent experience with FL-Air Heating & Cooling. From purchasing new equipment to getting it installed and...

Mark B.

Call them from New York for my house in Florida, which is unoccupied at the moment. For a problem with my AC unit, which was not working properly. Cannot...

Rachel M.

We Just Got Our New A/C Unit Installed! We Did So Much Research, and Met Many Companies. We Finally Decided On FL Air Heating & Cooling.

From the start...

Deborah

Troy came to service our a/c unit. He was very knowledgeable,professional and personable. We highly recommend this company and Troy for your ac needs

Bob V.

We found a company we really trust. I called and told them our thermostat was not working. Turns out it was a blocked drain which was much cheaper. So yea,...

Carey H.

They are always friendly, always come when they say they will, and have reasonable prices - and best yet, they're honest! After several terrible experiences...

Adam C.

Exceptional HVAC Service!

I recently had the pleasure of working with FL-Air Heating & Cooling, and I couldn't be happier with the experience. From start...

Rachel M.

We needed someone in a pinch on a late Friday afternoon after we realized our a/c wasn't working. We realized the fan outside was not working.

After I did...

Peter J.

Our air handler's blower motor ceased it's duties one night and I called Mark Lang with FL-Air on a recommendation from a co-worker the next day. Mark came...

Doug P.

I heard about this contractor and my friend was right, The guy was knowledgeable, fair and was efficient. I WAS REALLY IMPRESSED. This was my best...