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

(152096 reviews)

Michele Smith

in the last week

“One Hour Heating and Air is going to be super helpful to anyone who has issues with their A/C and heaters. They did some training at my residence, and they were fantastic! They know that we are not professionals but they way they explained the work was super easy to understand!”

William Laughman

in the last week

“We have 3 heating/cooling zones in our 2300 sf home. We were having some temperature discrepancies and frankly, we weren't sure what areas were covered by each thermostat. We called One Hour Heating and cooling. Jordan came out and evaluated our AC unit and our furnace. He found a couple of issues and explained each zone covered by each thermostat. He was fantastic. Jordan educated us on how our system works. I use the word educated because he explained everything very well was not pushy and was very polite, personable and professional. We had him do the work he recommended at a very reasonable cost. We will definitely be using one hour heating and cooling for our future needs.”

Rick Conant

in the last week

“They came in removed my ( my boat anchor Rheam water heater ) installed a new thankless unit , a unit that will finally give us a hot second and many following HOT showers . Great job !!! We have fought this new Rheam t50 gal tank for three years along with replacing the new tank along with valves. Thankyou Thankyou . Oh the furnace you put in is fantastic too.”

Dorene Shapiro

in the last week

“Very Happy with the service we received. My moms airconditioner died in the middle of the night Tuesday morning, they were there around noon the same day and a brand new air conditioner was installed by 11 am Wednesday! They understood my mothers medical needs and how important getting her air was. They clearly gave us multiple options and made the whole process easy. Thank you so much! Highly recommended!”

Elaine Lassinger

in the last week

“Austin did a throughly fantastic job with my AC unit. His inspection was very detailed and he explained everything each step of the way. I will definitely request Austin in the future.”

Manuela Woodrum

in the last week

“We had an emergency HVAC issue and called One Hour Air Conditioning and Heating. Jose responded promptly and was absolutely fantastic! He was professional, courteous, and thorough, taking the time to clearly explain the problem with our unit. Despite the late hour, he worked efficiently and had everything repaired quickly, restoring comfort to our home. His expertise and dedication to delivering exceptional service were truly appreciated. We highly recommend Jose and One Hour Air Conditioning and Heating to anyone in need of reliable, high-quality HVAC service.”

Bianca Alvarado

in the last week

“The owners of this company were so kind, professional, and informative. Jordan went above and beyond to get are AC unit back up and running. I couldn’t be more grateful to this company, they came out in such a timely manner and got the job done. If you're looking for amazing service, look no further.”

82mztasha

in the last week

“I scheduled to have my HVAC annual maintenance checkup before summer. Sean was on time, knowledgeable and even recommended a few things to keep my A/C running optimally! Job well done Sean! Thank you so much!”

Angela Lasorella

in the last week

“Marcus was great! He found the issue our system was having within minutes. He was extremely knowledgeable and explained everything in detail. Very happy with the service!”

Stephanie Brignoni

in the last week

“I can confidently speak to the extensive knowledge and professionalism here at One Hour Heating and Air Conditioning. They are incredibly trustworthy, and I have always been impressed with their dedication and expertise in air quality for the home. Jordan Ristau and their team are wonderful people to work with, and I wouldn’t hesitate to recommend them to anyone looking for reliable and knowledgeable professionals in this field! If you’re looking for someone to give you excellent service then look no further and give them a call!”