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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

A great experience with Mark and his team

We had our AC system replaced and had a great experience with Mark and his team. They we’re prompt with appointments, always notifying us to any changes in schedule and even came out to check on a small issue on the weekend no questions asked. Very professional and friendly.

Amy Wallace Hansen
Source: Facebook
Reliable and honest

FL-Air Heating is a very professional company.
Reliable and honest, thanks Mark.

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value

Maria Op
Source: Google
Great price , 5 star service

Had 2 systems installed , guys were very professional, on time and busted their but in this Florida summer heat. Great price , 5 star service. Definitely give them a call for your AC/heat needs

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value

Chris Bahr
Source: Google

M Moore

I’ve been using FL-Air for the last 3-4 years and have been very happy with their service. What I most appreciate is that they do not try to upsell you every time they do maintenance unlike other companies I have used. I’m on their maintenance program and they always remind me when maintenance is due.

Ilya Royzen

Response from the owner:Hi, Ilya. We appreciate your business & the 5 star review 😎

Yodae Njoy

Continuing great service, honest evaluation, no BS. All thumbs up 👍

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

Bob Krueger

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

Linda Reynolds

Brantht was wonderful and corrected the problem! Great company! Linda Reynolds

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

Chris Wilson

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

Chris Corn

Great service and always right on schedule! Lareik (our Tech) was very professional and friendly! Highly recommend this company!

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

Jerry Edmiston

These guys are The Best .... Especially Bobby... Bobby is very knowledgeable and friendly, a 5 Star Plus techy . Very Happy Customer 'E'

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

Penny Bradford

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

Christina Lopez

The service I received from my initial dealing with Tony through our install with Travis and Dustin were great! All responded quickly to our emergency and provided excellent service. Travis took pride in his work and explained all issues and took the time to take us through our new system. All were true professionals who provided excellent service at a fair price. Highly recommend!

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

Angela Beers

Bobby was nice and explained everything he did. He showed up on time and did maintenance on my unit. Very thorough and pleasant.

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

Michele Zimmerman

service is always prompt and the service techs are professional

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

Jeremy Chucko

Excellent from start to finish. Within 3 hours of flling out a request online, Brandon came to give us a second opinion on a quote for full system replacement. He confirmed we needed a new system, and proposed 4 options. We chose the best option, which directly compared with the original company quote was $9,000 cheaper! Installation was in two business days. The crew did an excellent job of removal and replacement, with exceptional cleanliness and no damage to our home. Nate came to install the Wi-FI thermostat and the system is running great. Top notch experience from start to finish.

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

Dennis Jones

Excellent and professional service.

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

Susan Ballesteros

Brandt is such an amazing gem for FL-Air Heating and Cooling. My maintenance was perfect which means my install was flawless too. Knowing I have a clean, cooling system for my family and me is so important in Florida. I know I picked the right company!

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

J. Smith

Always a solid visit with this company. Very fast, very effective. Brandon Boudreau is always very thorough in exploring root cause issues, to help the customer save money, time, and frustration. Couldn’t be happier. Well, I could be if HVAC equipment lasted 50 years Vice about 10ish!

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

Alexandra Gannon

Great service from a great tech and a very responsive company. They are the best!

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

Celeste Almerico

Brandon was polite and thorough. I look forward to meeting with him again. I always appreciate the wonderful customer service of Fl-Air.

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

Catherine Rizzo

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

Nicole Wynn

I’ve been using this AC company for years, and they’ve always delivered exceptional service. I even purchased my new unit from them, and their maintenance plan is top-notch—they’ve never missed an appointment. This summer’s extreme heat caused a few hiccups with my unit, but their prompt response, reliable repairs, and outstanding customer service never disappoint. I truly wouldn’t trust my home’s comfort to anyone else!

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

KEN COWDEN

Always a pleasure to do business with courteous pros. Gotta love their attitude toward their customers and their work.
Robert is a great plus to any business.
Routine maintenance June 2024, another tech performed our service. Everyone here has been great. This poor guy had to work in a Florida downpour, never skipped a beat. 100% satisfied.

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

Nora Barry

As a new Florida resident, your home AC is vital and must be properly maintained, it’s so great to have this piece of mind knowing that I will have my system up and running and keeping us cool year round! I signed up for the twice yearly maintenance plan with FL Air and am very happy with their service!! Brandt was on time, super professional and helpful and answered all of my questions while quickly completing the service and even tolerated my dog acting as his assistant the whole time;)

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

Sharon Brown

Great company and employees!

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

jesse goldrich

Mark is the owner and hands down most personable and professional tradesman I’ve ever dealt with! His team mirrors his genuineness and are a pleasure to work with! Highly recommend

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

Justin Marx

These guys consistently come through in the toughest of times for us. Great customer service, fast turnaround, competitive pricing. Thank you!

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

saanvi adhikari

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

Kathryn Travers

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

Jason L

Response from the owner:Hi, Jason. As mentioned in our previous response to your review, this was not intended for our company. In your initial review, you mentioned another AC company and employees that we do not employ. Please place this review where it is intended to go. According to your initial review, you were reviewing Mid Florida Air We are an AC company located in Tampa Florida, not DeBary, Florida. Thank you.

Aleks S

Fl-Air heating and cooling did a great job on replacing AC units in our condo.Very professional and good price

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

Minh

Brandon was professional and very knowledgeable. Gave good advice and was very thorough in diagnosing the problem. Would highly recommend this family owned business

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

Corey Anderson

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

Sis Paradise

Great job

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

ARLENE CHAPMAN

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

Sol Solom

Thank you for the great job

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

CJ Jones

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

Anthony Borrico

Great to work with. Honest and quality repairs

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

Rosemary Ashby

Courteous, professional service.

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

Darrell

Great experience with FL-Air Heating & Cooling! Very responsive and my HVAC problem resolved within hours. Thank you Bobby and FL-Air Heating & Cooling!!

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

Wayne Oneal

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

jason rebmann

Absolutely the best around here. Easy to schedule and very quick to respond. They work weekends and nights as needed. Easy to understand, explaining the services and charges. They are very reasonably priced and don't try to up-sell. Honest and dependable!

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

Cindy Condon

Amazing Service! We got a quick appointment and they were able to resolve issues that other A/C companies couldn't fix. Very professional as well.

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

Clay Fowler

Response from the owner:Hi, Clay. We must have done something right to get such a good rating from you. We really appreciate you taking the time!

Isaiah Martin

I had a great experience. Its always nerve-wracking having an AC tech come out because AC is such a non negotiable here and it can get expensive. The tech was great and I had a good experience, Brandt Allshouse is very solid if you're making an appointment here and need a tech

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

Mizz Mouse

Excellent service, prompt, professional, and got the job done right. Fair pricing and great communication—highly recommend!

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

Bradley adler

Very professional, friendly and went up and above to answer my questions. Don’t hesitate make this year air conditioning company I’ve had several and they don’t compare to the service that I receive.

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

I'm a boss Awesome

Representative was very professional and answered all of my questions.

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

Mike Brooks

Response from the owner:Hi, Mike. We must have done something right to get such a good rating from you. We really appreciate you taking the time!

Terence Piasecny

Brandon was very knowledgeable and personable. Good first experience. Will def be using this company in the future.

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

Harry Eberhart

Brandon was friendly, efficient and informative.Great Job, and will always continue to have FL-Air Heating & Cooling to service our Heat & AC needs in the future. I recommend anyone trying to decide on a solid company to have some service Heat & Air this is the company to go with.

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

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...