Summer electric bill spike in St. Louis? Your AC is usually why. Five causes, what to check first, and honest fixes from a local team.
You open the electric bill, do a double take, and check that it is actually yours. Summer bills always run higher in St. Louis, but a genuine spike, noticeably worse than the same month last year, is usually your air conditioner telling you something. Cooling is the single biggest line item on a summer electric bill, so when the number jumps, the AC is the first place to look.
Zach came around 9:00 the early part of my window. It was my annual checkup and he said everything looked good. I will be moving out of state soon but appreciate your past service.
Response from the owner:Thank you so much for the great review, Kay. We truly appreciate your business!
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.
From the phone to the completion of the job everyone is so polite and informative. I had Giovani as our representative and he was very informative and professional, and knew exactly what the problem was. Thanks so much.
Response from the owner:Thank you for the kind review, Frank! We appreciate you and your business.
Nick is great! We purchase Hoffmans maintenance plan - they come when needef
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.
Our AC condenser and coil were swapped out. The company did a very good job with staff that were most professional. Would happily recommend their company and keep them for all my annual maintenance work. I stress their staff is very knowledgeable and professional.
Response from the owner:Thank you, Adi! We're glad to hear you had a positive experience with our team and appreciate your recommendation. Your kind words about our knowledgeable and professional staff mean a lot to us.
Needed help after hours and they called me back right away! Super helpful and were able to fit me in when I was in a bind during the STL heat wave.
Response from the owner:Thank you, Christine! We're glad we could assist you promptly during the heat wave. Your satisfaction is our priority, and we appreciate your kind words!
Exceptional Service from Start to Finish!I recently hired Thomas Hoffmann Air Conditioning & Heating to replace my complete HVAC system, and I could not be happier with the experience.
The installation crew—Zachary and Giovani—was absolutely top-notch. They were professional, courteous, and incredibly meticulous with their work
Response from the owner:Thank you, Ruter! We're so glad to hear you had an exceptional experience with our team, and we'll definitely pass on your kind words to Zachary and Giovani. Your satisfaction means a lot to us!
Thomas Hoffman Air Conditioning and Heating did a fantastic Job for my company. They promptly responded to an emergency situation that occurred over a holiday weekend. They expedited the delivery of replacement parts Free piece of equipment that had broken down, and installed it immediately after receiving it. They were prompt, professional, and friendly. I would highly recommend them to anyone in need of HVAC services.
Response from the owner:Thank you, Joe! We appreciate your kind words about our team's promptness and professionalism, especially during an emergency. It's great to know that Thomas Hoffman Air Conditioning and Heating met your needs so effectively. Your recommendation means a lot to us!
Nick was at my house in Kirkwood within hours of my call and was able to get me back up and running on a super hot day. Very pleased with the service and will be calling them for my HVAC needs in the future.
Response from the owner:Thank you, Alex! We're glad to hear that Nick provided prompt and effective service, especially on such a hot day. We look forward to assisting you with your HVAC needs in the future!
Very punctual. Answers all my questions and concerns. Already scheduled for next service!
Response from the owner:Thank you, Theresa! We're glad to hear you appreciate having the same technician and the communication about your units. Your feedback on our customer service means a lot to us!
Fantastic service and friendly. We had an AC unit issue and they responded quickly and made the required repairs.
Response from the owner:Thank you, Steve! We're glad to hear you had a great experience with our service and that we could assist you promptly with your AC unit issue. Your feedback means a lot to us!
The truth of their proffesionalism forces you to Trust their expertise and a determined focus on customer satisfaction was unfortunately a rare experience in my years of east coast building maintenance.
Response from the owner:Thank you, Matthew, for recognizing our professionalism and commitment to customer satisfaction. We're glad to hear that your experience stood out after your years in building maintenance. Your support 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!
We live in Dardenne Prairie, and want to thank Tom for his excellent work in assessing our A/C unit that stopped working over Labor Day weekend where the outdoor temps were 100+. Tom not only had the exact components on-hand but also offered other future solutions to make our home more comfortable. Very personable and professional! Thanks Tom!
Response from the owner:Thank you, George! We appreciate your kind words and are glad to hear that Tom provided excellent service during such a hot weekend. Your satisfaction is important to us, and we're here to help with any future needs!
Nick came out to our house in Valley Park. Super nice and helpful. Got our AC back to running!
Response from the owner:Thank you, Katherine! We're glad to hear that Nick was able to help get your AC running again. Your satisfaction is important to us!
Nick is a very knowledgeable HVAC professional. He quickly and thoroughly inspected my system. Highly recommend Thomas Hoffman AC.
Response from the owner:Thank you! We appreciate your kind words about Nick and are glad to hear you had a positive experience with Thomas Hoffman AC. Your recommendation means a lot to us!
My air conditioner went out, my son called, Nick was able to come out same day, very pleasant and professional.
Response from the owner:Thank you, Louise! We're glad to hear that Nick was able to assist you promptly and provide a pleasant experience. We appreciate your kind words!
Saturday. Labor Day Weekend. 100 degrees for the 4th day in a row and counting. A.C. goes out. No hvac companies well return calls and their phonebots say they're not available until Tuesday or Wednesday. Nick with Hoffmann answer's first ring and shows up in a couple hours, make short work of it, house is cooling nicely. Thanks Nick and Company.
Response from the owner:Thanks, Chris! We're glad Nick was able to help you out quickly, especially during such a hot weekend. We appreciate your feedback and are here for any future needs.
Response from the owner:Thank you, Susan! We're glad to hear you Nick represented our company in such an impactful way. Your feedback means a lot to us!
Response from the owner:Thank you, Don! We're glad to hear that you had a great experience and that Nick made such a positive impact. We appreciate your feedback!
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!
First, Rule Out the Boring Explanations
An honest company tells you this part first. Before assuming your AC is failing, check two things. Compare this month’s usage in kilowatt hours, not dollars, against the same month last year; if usage is similar but the bill is higher, your utility’s rates went up, and your AC is innocent. Then consider the weather: a stretch of 100-degree heat-index days forces even a healthy system to run harder. Your utility’s website usually shows both numbers side by side. If your usage itself jumped and the weather was roughly normal, keep reading. Something in your system is working harder than it should.
1. A Clogged Filter or Dirty Coils
The most common culprit and the cheapest fix. A loaded filter chokes airflow, and grime on the indoor or outdoor coils blocks heat transfer. Either way, the system runs longer cycles to hit the same temperature, and every extra minute shows up on the bill. St. Louis makes this worse: long cooling seasons, heavy pollen, and cottonwood fluff coating outdoor units by mid-June. Replace the filter and gently clear debris from around the outdoor unit. Deep coil cleaning is part of a professional tune-up.
2. A Slow Refrigerant Leak
Low refrigerant is sneaky because the AC still works, just badly. It runs longer, cools less, and removes less humidity, so you feel warm and sticky while paying more. If your bills have crept up over two or three summers while comfort has crept down, a leak is a strong suspect. This is a certified technician repair: find the leak, fix it, and recharge the system.
3. Leaky or Uninsulated Ductwork
In many St. Louis homes, ducts run through attics that hit 130 degrees in July. If those ducts leak, and studies suggest a meaningful share of homes lose a significant portion of conditioned air through duct leaks, you are paying to cool the attic. Telltale signs: rooms that never quite cool, dust buildup near vents, and bills out of proportion to thermostat settings.
4. Short Cycling
If the system starts, runs a few minutes, and shuts off over and over, that is short cycling, and those constant starts draw far more power than steady running. Causes range from a failing thermostat or capacitor to icing coils or a system that was oversized on day one. Short cycling also beats up the compressor, so it is worth a professional look sooner rather than later.
5. A System Simply Wearing Out
Efficiency declines with age. A 12 to 15-year-old unit can use more electricity than a modern high-efficiency system to do the same job, and in St. Louis, our humidity accelerates that aging. If your system is in that range and the bills keep climbing, the spike is part of the repair-or-replace conversation and deserves honest math, not a sales pitch.
What to Do Next
Check the filter, clear the outdoor unit, and compare your usage history. If the numbers still do not make sense, a diagnostic visit can usually pinpoint the cause in one trip, and you get a written explanation of what we found and what it costs to fix before any work begins.
Contact Tom Hoffmann Air Conditioning & Heating Today
Tired of paying for your AC’s bad habits? Call (314) 471-7625 or schedule service online. A real St. Louis dispatcher answers 24/7, and our AC repair team will tell you exactly what your system has been trying to say.
