Get matched with top heating and air conditioning pros in O Fallon, MO

"Great Experience. I was concerned about the 22 yr age of our air conditioner able to keep working and wonder if a long wait time to get a product shipped like refrigerators last year, I called for a quote and within a week it was installed and working! Installers worked tirelessly until their work was done, clean and neat!"

"Our tech Robert installed an intake pipe for our HVAC unit to the outside. Tech arrived and completed the work to specifications. We will continue to use Dunn for our HVAC needs going forward. Thank you!"

"Liberty did a fantastic job identifying and rectifying airflow problems with our existing Hvac system that was installed less than two years ago by another company. They were punctual, responsive and incredibly knowledgeable. I highly recommend them."

"They were professional from the phone call to the installation. He had everything he needed to replace the hot water heater and proceeded. I would definitely recommend Hosack Plumbing."

"Seems I was spending a ridiculous amount of money on electricity because my central unit was not operating correctly. I now have flowing cold air."

"Fantastic company that went above and beyond for me. They were punctual, professional and did a top notch repair job on my washer in a very timely manner. What set this company apart from other companies is that it’s locally owned, been in business 40 years and is run like an old school business (that’s hard to find these days). They offer unmatched customer service, superior work, and great prices. The company manager/owner took my order personally over the phone. I knew I was in competent hands and ones I could trust. I must mention something about our service technician (who in addition to the above mentioned) is the reason I plan to give this company my lifelong loyalty and business. His name is George (@city location) and honestly speaking, I don’t think I’ve come across a kinder more patient person who’s come to my home for any type of job. I must have wasted at least an hour of his extra time (inadvertently) due to a mixup I made with my credit card (100% my fault). This mistake(s) caused this sweet man to have to leave my home and come back to my door from his car THREE separate times. He had to then write out three separate service orders, voiding the first two. The temp was close to 100 F that day, and I’ll tell you, he couldn’t have been kinder or more patient about it. When I told him how sorry I was for taking time away from his other customers, he said, “You are my customer right now.” I was so impressed by this as well as the company and workmanship overall. Afterwards, I called and spoke with the company’s manager/owner, Boris, to explain what had happened. He also, was such a kind, personable and understanding individual who listened and thanked me repeatedly for my service. If you’re looking for a fantastic Appliance Repair Service, LOOK NO FURTHER than All - American Appliance Service Inc.!!"

"I highly recommend AAA home services. They installed a brand new HVAC system and the entire process was trouble free every step of the way. I have had them out to service the system twice a year and the scheduling to do so is easy and the service has been excellent. AAA home services has always communicated well and I have had them do exceptional plumbing work including the installation of a hot water heater. Thank you AAA home services."

Looking for reliable HVAC service in St. Louis? Aire Serv of St. Louis is your local expert for residential and commercial heating and cooling. From emergency AC repair during humid Missouri summers to furnace maintenance before the winter chill, our professional technicians are available to keep your home comfortable. We pride ourselves on transparent, upfront pricing, no overtime charges, and the "Done Right Promise." Whether you need a system replacement, duct cleaning, or a routine tune-up in Fenton, Webster Groves, or Kirkwood, we are the team you can trust. Breathe easy with Aire Serv—your comfort is our top priority. Call us today to schedule your service!

"Had some filters updated. Glad to have a great HVAC guy!"

"Adam did the work in my home today. There were three heating and air-conditioning units which were checked out and some which needed some repair. I highly recommend him. Reasonable cost excellent knowledge and willing to take the time to do an excellent job."