HVAC Installation & Repair in Lake St. Louis

Experience the best of Midwest living in Lake St. Louis, where each season brings its own charm. From lush, rainy springs to hot, sunny summers, and mild autumns with beautiful foliage, we've got it all. But when winter rolls in with its unpredictable weather and temperature swings, you'll want a reliable HVAC system. That's where we come in, ready to help with top-notch service!

Heating Repairs in Lake St. Louis, MO: Your Comfort is Our Priority

As November approaches, so does the chill of winter. In Lake St. Louis, MO, a functioning heating system isn't just a luxury—it's a necessity. At One Hour Heating & Air Conditioning® of Lake St. Louis, we understand how easy it is to forget about HVAC maintenance while you're enjoying those crisp fall breezes through your open windows. But don't worry, we've got your back!

We pride ourselves on offering the finest heating repair services in Lake St. Louis, MO. Our team knows that heaters don't follow a 9-to-5 schedule. Whether it's the dead of night in sub-zero temperatures, during your workday, or just as you step out of a warm shower, we're ready to respond. Our professional, highly-trained technicians are available 24/7 to provide the heating relief you need. No job is too big or too small—our goal is to keep you cozy in your Lake St. Louis home, no matter what.

Lake St. Louis' Premier Heating & Air Conditioning Repair

At One Hour Heating & Air Conditioning® of Lake St. Louis, our reputation is our pride. We've built our business on unparalleled customer service and overall experience. Our promise? "Always on time, or you don't pay a dime." We understand that while your HVAC system in Lake St. Louis might need repairs, you could be tied up at work in St. Louis. That's why we respect your time, sticking to our appointment schedules to keep your day as normal as possible. Our aim is to solve your HVAC issues without adding unnecessary stress to an already challenging situation.

24/7 HVAC Service in Lake St. Louis, MO: We're Just a Call Away

Don't hesitate to reach out the moment you notice an issue with your home's HVAC system. We'll be there in a flash to provide relief. As an added bonus, your service call is free with repairs. Contact our Customer Service team now for more information or to schedule your appointment. Worried it's too late to call? Don't be! We provide round-the-clock emergency service to ensure your comfort, no matter the hour.

Lake St. Louis residents, your comfort is just one call away. Let us show you why we're the most trusted name in HVAC services in the area!

We Have a Reputation

For Being Punctual, Friendly and Knowledgable

4.82

(154546 reviews)

Ahili Lozano

in the last week

“Had trouble with turning on my heater. Joshua was quick to have it working in no time. He also showed me the issue and how to address it. Very friendly and professional. Happy with the service!!! Will recommend to fam and friends. :)”

Phyllis Bridges

in the last week

“The technician was on time, his work was efficient, and he even did extra cleaning on a drain. He was polite, quiet, and fast. This company cares about their customers. I made the right decision when choosing them for total furnace and air replacement last fall.”

Carol Shifflett

in the last week

“I recently had to replace HVAC and furnace. Scotty has been my go to person for many years. Always polite and cheerful. He informed me it was time to get the units replaced. I had been dragging my feet for a while. I took the plunge and had both units replaced. The two guys (Nick was one. Unfortunately I did not get the other person's name.) They arrived about 10:00 AM and never stopped until after 5:00PM. Did not take any breaks, just kept their heads down and worked hard. Very cordial and happy folks. Explained everything they were doing. Thank you.”

Derrick Crandall

in the last week

“Walter was professional, thorough and friendly. In addition to seasoal changeover from heat to AC, he offered expert advice for overcoming a long-time problem of thermostat location simply and based on existing smart Honeywell units. Evaluated UV bulbs and other technology. Really intend to ask for him for future service needs.”

Inday Candy

in the last week

“Edwin our technician is very knowledgeable and explained in details what needs to done with our HVAC. He has prepared multiple recommendations which enable us to have choices on what needs to be done. He has great personality too. Great job!”

Cindy Sandoval

in the last week

“I had a great experience with One Hour Heating & Air Conditioning in Torrance thanks to Joshua! He was professional, knowledgeable, and extremely courteous from start to finish. He arrived right on time, quickly diagnosed the issue with our AC unit, and explained everything clearly before beginning the repair. What really stood out was how respectful he was of our home—he wore shoe covers, cleaned up after the job, and made sure everything was running perfectly before leaving. Joshua truly went above and beyond, and I wouldn’t hesitate to recommend him to anyone needing HVAC service. Great service like this is hard to come by!”

Brian Drew

in the last week

“My technician Michael Tran was awesome. He arrived sooner then expected, took his time looking over the system and showed me different price packages that were best based on the situation. Michael repaired and got everything working again. Overall my first experience with them and the tech was exceptional.”

Morton Hughes

in the last week

“Zachary Brown, the service technician who came to my home for a a/c tuneup and then discussed the purchase of a new a/c, because my current one was installed in 1996, and is worn out, was very knowledgeable, answered all my questions satisfactory and was very helpful and professional. I received quality customer service which is very rare nowadays. My highest compliments to Niceville one hour heating and air conditioning for employing such a great technician”

Calen Dehen

in the last week

“Great experience working with Erick and Jim. Erick spoke with my dad and I at length, beyond business hours, to make sure all of our questions and concerns were addressed, prior to install, and selecting the best furnace to meet my needs. Jim was professional and courteous in my home during the install. Would use this company again.”

Brian Park

in the last week

“Top notch operation. Always on time. Straight forward pricing.”