AC Blowing Hot Air: How to Troubleshoot and Repair Your Air Conditioner - Polar Bear Air Conditioning |
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AC Blowing Hot Air: How to Troubleshoot and Repair Your Air Conditioner

Man using paper to fan himself due to broken air conditioner blowing out hot air in his Cayman Islands home.

The Cayman Islands is our paradise in the sun, but for homeowners whose ACs are blowing hot air, things are much less heavenly. Knowing how to troubleshoot and how to fix an AC that’s blowing warm air can help you prepare for times when the mercury rises but your AC can’t keep up.

Rising temperatures push AC systems to their limits. One of the most frequent complaints we get are reports of ACs blowing hot air—much to homeowners’ chagrin.

So, what is the root cause of an AC that’s blowing hot air? A primer on possible causes and their fixes can help you troubleshoot your system and learn how to fix your AC when it’s blowing warm air. Let’s take a look!

Refrigerant Leaks

One of the most common reasons for ACs blowing hot air is a refrigerant leak. If refrigerant leaks from your HVAC system, it cannot remove the heat from the air. As a result, you feel warm air coming through your vents. When there’s a refrigerant leak, you might notice hissing noises coming from your unit, frozen evaporator coils, and elevated electricity bills.

Human Error

Sometimes the simplest answer is the right one, and fixing an AC that’s blowing warm air is as simple as setting your thermostat to the correct level. 

No, it’s not unheard of for air conditioning techs to receive emergency AC repair requests and respond to calls of ACs blowing hot air only to realize that the homeowner has set the thermostat incorrectly. 

For instance, if the FAN setting on your AC thermostat is set to “ON” instead of being set to “AUTO,” then it will run continuously. When the system is between cooling cycles, the air coming from your vents may be warm. The easy fix is just to check your settings, making sure your fan is on “auto” and that you have selected “cool” and not “warm.”

Frozen Evaporator Coils

When poor airflow, blower motor damage, a refrigerant leak, or some other issues lead to the evaporator coils of your unit getting too cold, it can cause the coil to freeze. You can try using a heat gun or even a blow dryer to thaw frozen evaporator coils. However, addressing the root problem of why the coil temperature is below freezing can prevent it from happening in the future.

Dirty Air Filters 

One of the best things you can do for your HVAC system is to make sure its air filters are always clean. A dirty filter prevents the proper movement of air throughout your unit, which strains the AC in general and can lead to your AC blowing hot air.

Flipped Breakers 

If a breaker has tripped in your home’s electrical panel, then it can lead to incomplete or interrupted cooling cycles. Reset any tripped circuit breakers, look for blown fuses, and make sure that the power switch on the outdoor unit is actually on.

Reach Out to the Pros at Polar Bear

These tips can help you understand more about how to fix an AC blowing warm air. However, if you troubleshoot your system and still can’t figure out the issue, it’s time to call the pros.

While it’s tempting to do it yourself, the truth is the tools and equipment necessary for most repairs of ACs blowing hot air require professional training to use. Polar Bear’s air conditioning technicians offer AC repair in the Cayman Islands and have what it takes to fix AC units blowing warm air quickly and efficiently.


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John Thistle
John Thistle
21:32 17 May 23
I recently had my air conditioning unit installed by Polar Bear Air Conditioning in Cayman Kai. I was very pleased with the service I received. The workmen, Jerome, Tony, and Nathan, were all professional and courteous. They arrived on time and were dressed in their uniforms. They laid out carpeting where they would be walking inside the house to avoid leaving debris or making a mess. They worked clean and kept the space tidy. They were polite and provided me a good understanding of the work they completed as well as showed me all pieces of equipment. They emailed me a jpg image of each piece of equipment's information plate so that I could record it in my home management software, as requested.Here are some specific details about the work they did:They installed 3 new high-efficiency air conditioning units that are much more energy-efficient (26 SEER) than my old units.They cleaned and disinfected the air ducts, as well as replaced previously installed flex ducts with rigid duct work that is superior in efficiency and durability.They installed new filters to help keep the air clean and free of allergens.They explained the operation of the new units to me and answered all of my questions.They cleaned up after themselves and left my home in good condition.I would highly recommend Polar Bear Air Conditioning to anyone in need of air conditioning installation or service. They are a professional and reliable company that provides excellent customer service.
Charles Mobley
Charles Mobley
01:19 01 May 23
Our ac stopped working a few weeks ago and Polar Bear sent Roemaine and Tyrone to diagnose the problem. Roemaine and Tyrone very quickly identified the problem and communicated with me. It turns out the best option was replacing the condensing unit which Paul quoted within a matter of minutes and they had expert installation team (Tony and Jerome) complete late in the afternoon with short notice. I’m very happy with their work!
17:26 22 Feb 23
I have, over the years been trying to find a reliable, professional A/C maintenance and repair company. I have tried a few. That search is now over after using Polar Bear. Billy and Jerry were absolutely a pleasure to work with. Knowledgeable and professional from the initial diagnosis to the final repair. I highly recommend this company and the team that came to do work on my AC. Tim.
Gill Gordon
Gill Gordon
01:58 27 Jan 23
Polar Bear technicians are always very polite, friendly and professional in their service. Each of their technicians that we have dealt with have been great and they are always super responsive to getting someone out. Pictured are Antony and Billy who completed our recent service 👍
Zichri M.
Zichri M.
22:27 30 Dec 22
Great work. I received an email and also a call from the dispatcher that the tech would be calling me, and sure enough, the tech (Simon) called shortly after that to let me know he was on his way which was very much appreciated. The customer service from all of the team and updates was spot on, and Simon was very thorough and very knowledgeable. He was also very courteous and professional. I rate Polar Bear as the best company in town. Great work!
Glenroy Miller
Glenroy Miller
03:27 24 Dec 22
Tyrone is very knowledgeable and professional, he gave me a step by step update of what he was doing. He also gave advice on how best to protect not only the unit but my family. My wife and I are totally satisfied with the service.
Kyle Roberts
Kyle Roberts
22:50 23 Dec 22
Polar Bear's service and response was amazing! Nicole who answered my phone call and scheduled me was extremely friendly, accommodating and knowledgeable! The Technician assigned to me was Simon and he was also extremely friendly and very knowledgeable. Within a minute of looking at my system he knew what the errors and issues were! He was able to fix one of the two problems that day, and then came scheduled and came the following day to fix the remaining issue. He was perfectly on time and the courtesy call before arrival both times before arriving was a welcome touch as it made sure that I was ready.Will continue using polar bear for all my HVAC needs! 5*
Kayla Shibli
Kayla Shibli
01:09 05 Oct 22
My experience with Polar Bear has been awesome!!!! From the beginning, the office staff were so professional and kind, then receiving my AC quote, the gentleman has been very prompt in his response time—, the kind of employee that puts customer first and has such a nice and an approachable attitude, very patient in answering my questions and providing guidance as required by me- customer focus completely, then as if that wasn’t enough to convince me to move my AC maintenance and installation to Polar Bear; the technicians that attended to my AC installation provided such excellent service— what stood out was how they used a carpet that was placed on my floor to avoid making any mess on my floor and whatever mess they did make, the technician used their broom to remove it. I know this message is long but I really wanted to express my THANK YOU and appreciation for such excellent customer service that I’ve experienced by Polar Bear — you have won me as a customer!! THANK YOU! Keep up the excellent customer service!!! Looking forward to building a relationship with you as a new customer.
Robert L White
Robert L White
11:48 15 Aug 22
Olivia and Demitri very professional , competent and are delightful people! She came by and diagnosed some issues with our AC system . I am reviewing your estimate at this time..I truly enjoyed meeting them. They both real assets to your Company!Rob
Omari Rankine
Omari Rankine
04:58 10 Jul 22
I am very pleased with the service that was provided by Polar Bear. I had an issue where the ac was not working at one of my rental properties after hours on a weekend. Rohan came all the way out to East End at 10pm and worked on the issue to get the system back up and running. He was very thorough and explained the issue in detail, and the measures I needed to take to prevent it from reoccurring. Excellent customer service

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