As St. Louis residents, we rely heavily on our air conditioning systems to keep us cool and comfortable during the sweltering summer months.
So when your AC starts blowing hot air instead of the refreshing coolness you expect, it can be frustrating and concerning. At Thomas Hoffmann Air Conditioning & Heating, we understand how disruptive this issue can be. Let’s explore why your AC might blow hot air and what you can do about it.
This is the 2nd time we have used this company for our hvac needs. Great company, fast response, tons of communication and they find the problem and fix immediately. Even during the very hot weather. Couldn't recommend them enough.
Response from the owner:Thank you so much for the kind review, Erin. We appreciate your continued support!
Very prompt response and very professional and conscientious repair service. Nick did a great job and is a very nice guy.
Response from the owner:Thank you, Rich! We're glad to hear you had a great experience with our repair service. Nick will be pleased to know his efforts made a positive impression. We appreciate your feedback!
I called on a Monday morning as air conditioning was blowing warm air. They were able to come to my house very early afternoon and fixed the problem. Would highly recommend and will use them again.
Response from the owner:Becky thank you so much for your great review. We appreciate your business and your kind words.
Had new hot water heater put in. Zack was great. On time and neat
Response from the owner:Thank you, Dawn! We're glad to hear that Zack provided great service and was punctual and tidy during the installation of your new hot water heater. We appreciate your feedback!
I lost my AC overnight. I called at 8 and Nick got here at 12:30. He took his shoes off before he came in, which rarely happens with contractors. He diagnosed the problem in no time and was out the door in less than an hour. He also put back together the closet where access to the attic and furnace is. Couldn't be happier.
Response from the owner:We appreciate your recognition of our dedication to finding the root cause of the issue rather than opting for a quick fix. Thank you for acknowledging our efforts!
I can't thank them enough for getting my ac fixed so quickly. The technician knew exactly what was wrong and had the part to fix it. Thanks again for great work.
Response from the owner:Thank you, Karen! We're glad to hear that our technician was able to quickly fix your AC and provide great service. Your appreciation means a lot to us!
Response from the owner:Thank you, Eileen! We're so glad to hear you had a great experience and appreciated our professionalism. Your feedback means a lot to us!
Always professional, always on time and good value for the work that they do! Appt was made at 8:10 am and technician arrived at 10:30 am ! Air conditioning restored! 🤞🏻
Response from the owner:Thank you, Jan, for your kind words about our professionalism and value; we truly appreciate your support!
Great service. Showed up on time. Professional. Happy and Satisfied customer.
Response from the owner:Thank you, Deb! We're glad to hear you enjoyed our service and appreciated our professionalism. Your satisfaction means a lot to us!
Nick demostrated excllent customer service,professionalism, and technician.
Response from the owner:Thank you, Kevin! We're glad to hear that Nick provided excellent customer service and professionalism. Your feedback is greatly appreciated!
On time. Professional. Answered all my questions. Suggested permanent fix. Explained why. What happened. What else I need to do. Impressed with time schedule next day service.
Response from the owner:Thank you, Judy! We're glad to hear you had a positive experience and that your questions were answered thoroughly. It's great to know the timely service met your expectations.
Easy to work with. As transparent as I've found in mechanical contracting. Techs are professional and courteous. Would recommend and will use again.
Response from the owner:Thank you, Chris! We appreciate your kind words about our team's professionalism and transparency. We're glad to hear you had a positive experience and look forward to working with you again!
Nick fixed a broken pipe linked to one of our units the same day we called for help. The fix was fast, efficient, and reasonably priced.
That meant that our kids could sleep peacefully that night upstairs with the AC unit working again, plus our daughter could rest well in her room the next morning following dental surgery!
Thomas Hoffman saved the day.
Response from the owner:Thank you, Yusuf! We're glad to hear that Nick was able to quickly fix the pipe and ensure your kids had a comfortable night. It's great to know that Thomas also played a key role in making your experience a positive one. We appreciate your feedback!
Another GREAT experience from Hoffman HVAC. They installed my whole unit last year and had them come out today to check everything was good for summer. Professional and took time to check everything and made sure I understood everything. Will continue to use Hoffman HVAC.
Response from the owner:Thank you, Tony, for your wonderful feedback! We're glad to hear that our installation crew made the process smooth and efficient for you. Your satisfaction means a lot to us, and we appreciate your recommendation!
Thank you for the quick booking and reliable service. I never have to second-guess when my HVAC unit has an issue — your technicians are incredibly knowledgeable.
Response from the owner:Thank you, Hyun! We appreciate your kind words and are glad to hear that our technicians have been able to provide you with reliable service and expertise.
We recently contracted with Thomas Hoffman for our commercial HVAC maintenance. They were more reasonably priced than our previous contractor and they were prompt and professional on their first visit with us. We are more than satisfied with their service.
Response from the owner:Thank you, Nick, for sharing your positive experience with Thomas Hoffman! We're glad to hear that you found our pricing reasonable and that our team provided prompt and professional service. Your satisfaction means a lot to us!
Nick was fantastic from start to finish. He called ahead to give me an arrival window, which I really appreciated. It was 80+ degrees in my house and needed someone to come out today. I called two other places first and the earliest anyone could come out was tomorrow afternoon. The woman I spoke to on the phone said she could have someone out within the hour.
Once he was here, he took the time to actually show me what caused the leak rather than just describing it. That kind of transparency goes a long way.
He explained everything clearly, didn’t upsell anything, and was genuinely personable throughout the whole visit.
What stood out to me most was that he spoke directly to me and made sure I understood everything, not just the other person in the room. That’s rarer than it should be, and it made a real difference.
Highly recommend Thomas Hoffman Air Conditioning and Heating!
Nick was honest, communicative, and great at his job!
Response from the owner:Thank you, for your wonderful feedback! We're glad to hear that Nick provided such excellent service and took the time to ensure you understood everything. Your recommendation means a lot to us!
Nick came out and looked everything over to find the problem and while looking explained everything in detail and gave me great tips to keep system running smoothly. He was very professional and I know I will always call Hoffman whenever I need help because of his attitude and demeanor. Very happy with the service.
Response from the owner:Thank you, Ron, for your positive feedback! We're glad to hear that Nick provided you with detailed explanations and helpful tips. Your satisfaction means a lot to us, and we look forward to assisting you again in the future!
Response from the owner:Thanks so much for the great reviews.
Top Reasons Your AC May Be Blowing Hot Air:
Thermostat Issues
Dirty Air Filter
Low Refrigerant Levels
Frozen Evaporator Coil
Compressor Problems
Outdoor Unit Issues
Leaky or Damaged Ductwork
Incorrectly Sized AC Unit
Let’s dive deeper into each of these issues:
Thermostat Issues
Before diving into more complex problems, always start with the simplest explanation. Check your thermostat to ensure it’s set to “cool” mode, and the temperature is lower than the current room temperature. Sometimes, the issue is as simple as an accidental switch to “heat” mode or a thermostat that needs new batteries.
Dirty Air Filter
A clogged air filter is one of the most common culprits behind an AC blowing hot air. When your filter is dirty, it restricts airflow, causing your system to work harder and potentially overheat. This can lead to warm air coming from your vents. We recommend checking and changing your air filter every 1-3 months, depending on usage and household factors like pets or allergies.
Low Refrigerant Levels
Refrigerant is the lifeblood of your AC system, responsible for absorbing heat from your home’s air. If your system is low on refrigerant, often due to a leak, it can’t effectively cool the air. This results in warm air blowing from your vents. If you suspect a refrigerant issue, contacting a professional HVAC technician is crucial, as handling refrigerant requires specialized training and equipment.
Signs of Low Refrigerant:
Warm air from vents
Hissing or bubbling sounds from the AC unit
Ice formation on refrigerant lines or evaporator coil
Higher than average energy bills
Frozen Evaporator Coil
Ironically, a frozen evaporator coil can cause your AC to blow hot air. This can happen due to restricted airflow (often from a dirty filter) or low refrigerant levels. When the coil freezes, it can’t effectively absorb heat from your home’s air. If you notice ice on your outdoor unit or indoor air handler, turn off your system and call for professional service.
Compressor Problems
The compressor is the heart of your AC system and is responsible for pressurizing and circulating the refrigerant. If it’s not working correctly, your system won’t be able to cool the air. Compressor issues can range from electrical problems to mechanical failures and typically require professional diagnosis and repair.
Outdoor Unit Issues
Your AC system consists of both indoor and outdoor components. If the outdoor unit is dirty, blocked by debris, or not receiving power, it can’t effectively release the heat absorbed from your home. This results in the system recirculating warm air. Ensure your outdoor unit has clear space around it and is free from leaves, grass clippings, and other debris.
Leaky or Damaged Ductwork
Sometimes, the problem isn’t with your AC unit but the ductwork that distributes the air. Leaks or damage in your ducts can allow hot attic air to mix with the cooled air, resulting in warm air from your vents. Professional duct inspection and sealing may be necessary to resolve this issue.
Incorrectly Sized AC Unit
If your AC system is too small for your home, it may struggle to cool the air effectively, especially on the hottest days. Conversely, an oversized unit might cool your home too quickly, leading to short cycling and poor humidity control. Both scenarios can result in inconsistent cooling and potentially warm air from your vents.
What Should You Do?
If your AC is blowing hot air, here are some steps you can take:
Check your thermostat settings and batteries.
Inspect and replace your air filter if it’s dirty.
Look for signs of freezing on your indoor or outdoor unit.
Ensure your outdoor unit is clean and unobstructed.
If these simple checks don’t resolve the issue, it’s time to call in the professionals.
Benefits of Professional AC Maintenance:
Improved energy efficiency
Extended system lifespan
Reduced risk of unexpected breakdowns
Better indoor air quality
Consistent cooling performance
At Thomas Hoffmann Air Conditioning & Heating, we have the expertise to diagnose and resolve various AC issues. Our team of certified technicians can quickly identify the root cause of your AC blowing hot air and provide practical solutions to get your system back to peak performance.
Remember, regular maintenance is vital to preventing many of these issues. Schedule annual tune-ups with our team to keep your AC system running efficiently and extend its lifespan.
Contact Us Today
Don’t suffer through the St. Louis heat with a malfunctioning AC. If your system is blowing hot air or experiencing other cooling issues, contact Thomas Hoffmann Air Conditioning & Heating today. We’re here to ensure your home stays relaxed and comfortable all summer.
