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.
This company is the best! Had another service our HVAC and had nothing but issues. Zach from Hoffman is courteous and efficient. Highly recommend this company
Response from the owner:Thank you, Mark! We're glad to hear you had a great experience with Zach and appreciate your recommendation. Your support means a lot to us!
Response from the owner:Thank you, Darrell! We're glad to hear that we could assist you promptly and efficiently with your repair. Your satisfaction means a lot to us!
Ryan arrived 20 minutes early. A great start to our day as we had a plumber coming today as well. They did overlap, but Ryan was thorough, efficient and gave us a clean bill of health on our furnace in about 45 minutes. WE LOVE THOMAS HOFFMANN AIR CONDITIONING AND HEATING. Oh and get the combo service plan for both your furnace and AC annual service. Very reasonable.
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.
Zach was incredibly friendly, professional, and easy to work with. They provided high-quality work and clearly take pride in what they do. The entire experience was smooth and pleasant from start to finish. It’s refreshing to work with people who are not only skilled at their job but also genuinely kind and helpful. I highly recommend them!
Response from the owner:Thank you, Brandon! We're glad to hear you had a smooth and pleasant experience with Zach. Your kind words about their professionalism and kindness mean a lot to us. We appreciate your recommendation!
Tech was on time and stayed till they were finished. He was very thorough listen to our concerns and had open and honest suggestions all while having casual conversation and making me and my wife feel comfortable.
Response from the owner:Thank you for recognizing our team's punctuality and dedication!
Response from the owner:Thank you, Premchand, for your kind words about our service! We appreciate your feedback and are glad you had a great experience.
I love dealing with this company. Our tech, Zach, is professional and friendly. I love the level of communication from Thomas Hoffman: from the text/email reminders to schedule an appointment to the update of the appointment itself. Highly recommend this company!!
Response from the owner:Thank you, Dale, for your wonderful feedback! We're glad Zach could assist you effectively, and we appreciate your kind words about our communication and service.
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!
They installed our system and came out to check on a concern promptly and didn’t charge us.
Response from the owner:Thank you, Thomas! We're glad to hear that our team addressed your concern quickly and without any charges. Your satisfaction means a lot to us!
Zachary is great! We purchase Hoffmans maintenance plan - they come when needed
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.
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.
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!
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.
