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.
The technician Giovanni was excellent and on time very professional and efficient and knowledgeable of the project at hand ,gave great advice but most of all did great work 👏 thank you .
Response from the owner:We are so happy to hear you had a great experience, Sam! Thank you for the review, and thank you for your business.
Your service technician was very professional and knowledgeable. And did not appear to try to give me bogus information. I truly appreciate his honesty because several other companies did not appear to be honest, obviously wasn’t honest, my gut feeling told me they were not honest and tried to get me to spend $10,000 for a problem that was much simpler to fix. I look forward to you servicing all my properties, and possibly those of the rest of my family.
Response from the owner:Thank you so much for the kind words and great review! We appreciate your support.
Very prompt, communication was great, and the workers were very polite. I highly recommend them!
Response from the owner:Thank you, Lianne! We're glad to hear that you had a positive experience with our team and appreciate your high recommendation.
Water heater repaired, appointment done the same day, effective, courteous
Response from the owner:Thank you, Leticia! We appreciate your kind words and are glad to hear that the water heater was repaired promptly and effectively. Your satisfaction means a lot to us!
Response from the owner:Thank you, Hank, for your wonderful feedback; we're glad you enjoyed the fast, friendly, and professional service, and we'll be sure to keep up the great work!
The service tech Giovanni did a fantastic job. Our gas fireplace is working like new again so we’re ready for the cold weather!
Response from the owner:Thank you, Mr, for your fantastic review! We're glad to hear Giovanni provided you with excellent service and professionalism. Your recommendation means a lot to us!
⭐️⭐️⭐️⭐️⭐️ If I could give 10 stars, I absolutely would.
Last night our furnace went out unexpectedly, and with three kids in the house, the temperature dropped fast. Giovanni went above and beyond in every way possible. Instead of charging me a late-night service fee, he simply asked, “Are you decently handy?” and offered to walk me through some troubleshooting steps to get our heat back on so my children wouldn’t have to sleep in the cold.
Not only did he guide me through the process, he even FaceTimed me and showed me exactly what to take apart, how to put it back together, and what signals to watch for. It felt like having a real technician standing right next to me the entire time. Thanks to him, our heat was restored within minutes.
In a world where true customer service is hard to come by, Giovanni is a rare find. It is a guaranteed fact that any future repairs, maintenance, and the new heater/AC system we’ll be needing this coming summer/fall will absolutely be done through him. His honesty, kindness, and expertise have earned our business for life.
Highly, highly recommend.
Response from the owner:Thank you, Jeff, for sharing your experience! We're so glad to hear Giovanni was able to help you and your family during that tough situation. Your recommendation means a lot to us, and we appreciate your trust in our services for the future!
My neighbor referred these guys to me when had water heater problem. Previous company told me I needed to replace it. Tom’s technician fixed it for less than $200. This was over 2 years ago and have been using their service ever since. They are very trustworthy.
Response from the owner:Thank you, Mary, for sharing your experience and for trusting us with your water heater issue; we're glad our technician could help and that you've continued to rely on our services!
I called this company earlier today because I was having a bunch of issues with my HVAC system. They were incredibly friendly and walked me through troubleshooting step by step over the phone. They didn’t even charge me for the call. Thanks to their honest advice, I was able to get things running smoothly again. Really grateful for their help and would definitely recommend them if you want straightforward and trustworthy service. Five stars all the way!
Response from the owner:Thank you so much for the glowing review, Hector! We appreciate your business and look forward to working with you in the future.
Nick did not set current time. — Monday Hoffmans Zach came to fix correct time. We DID NOT want a timed thermostat — we prefer to set temperatures manually
Response from the owner:Thank you, Pat, for your kind words about Giovanni; we appreciate your feedback and are glad to hear that he made a positive impression.
Clear communication about arrival, service and costs.
Response from the owner:Thank you, Margaret, for your kind words! We appreciate your feedback on our clear communication and are glad you had a positive experience.
I will highly recommend this business for your air and heater repair. Prompt, knowledgeable and courteous service.
Response from the owner:Thank you, Judy, for your kind words and recommendation! We're glad to hear you were pleased with our prompt and courteous service.
Thomas Hoffman was very responsive to our after hours inquiry, even walked us through some trouble shooting over the phone. We provided pictures of the unit and they were able to quickly buy, schedule and install the part to keep our family warm!
Response from the owner:Thank you, Ali! We're glad to hear that Thomas was responsive and helpful in getting everything sorted out for you and your family. Your feedback means a lot to us!
Nick came by, identified the problem quickly and had it fixed. Great service!
Response from the owner:Thank you, Ted! We're glad to hear that Nick provided you with quick and effective service. Your feedback is greatly appreciated!
Great service. Responsive. Well trained technicians. Honest friendly and thorough. I highly recommend Tom Hoffmann and his team.
Response from the owner:Thank you for your kind words! We appreciate your recommendation and are delighted to hear about your positive experience with our team.
Ryan Taylor with Thomas Hoffman did an outstanding job in servicing our unit & explaining everything to me, especially how our humidifier worked, since we were new home owners & had not had one before. Thank you!
Response from the owner:Thank you! We're glad to hear that Ryan and Thomas provided you with excellent service and helped you understand your new humidifier. We appreciate your feedback!
As always, the Hoffmann technician Zach was polite, professional, and efficient. Pricing is reasonable and even more importantly, they are dependable. I will continue to use Thomas Hoffman A/C and Heating.
Response from the owner:Thank you, Mark, for your kind words about our technician and for your continued trust in Thomas Hoffman A/C and Heating; we truly appreciate your support!
Response from the owner:Thank you, Brandon! We appreciate your kind words and are glad to hear about your positive experience with Hoffmann’s professionalism and thoroughness.
Our service technician arrived right on time and was professional, friendly, efficient and courteous. We couldn’t ask for more.
Response from the owner:Thank you for sharing your positive experience with our service technician! We appreciate your kind words and are glad to hear that you were satisfied with the service provided.
I'm a new customer and had my first appointment for furnace check.My tech was Zack and what a professional. He explained how he checked system and answered all my questions. This was a very good experience
Response from the owner:Thank you, Patricia, for your kind words! We're glad to hear that Zack provided you with a professional and informative experience during your furnace check. Your satisfaction means a lot to us!
Thomas Hoffman is a wonderful company to work with. Techs are knowledgeable, personable & efficient.
Response from the owner:Thank you, Christine, for your kind words about our team; we appreciate your feedback and are glad to hear you had a positive experience!
I called on December 25th at midnight and started leaving a message and Thomas Hoffman the owner called me back almost immediately. He said he would come out the next morning between 8:00 and 10:00 am snd he was promptly on time. He fixed my problem and while he was there I decided to get an estimate for a new furnace and air conditioning unit. The price was very reasonable and the installers one of them being his son were both very professional very courteous, polite, arrived on time and finished the same day. I enjoy knowing that I now have the support of Thomas Hoffman heating and air conditioning along with the peace of mind that comes with owning a Trane. Nothing stops a Trane.
Albert Koesterer
Response from the owner:Albert thanks so much for your kind reviews and your business. We truly appreciate it!!!
The Thomas Hoffmann team did a great job taking care of our semi annual HVAC maintenance. They not only worked with us to schedule the visit, but also did an excellent job sending us reminders on when they would be out.
Response from the owner:Thank you so much for the great review, Bob! We appreciate your support and are happy to hear you had a great experience!
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.
