Top-rated heating & air conditioning/hvac work.

Get matched with top HVAC Contractors in O Fallon, MO

There are 89 highly-rated local HVAC contractors.

Recent HVAC Companies Reviews in O Fallon

  • Choice Home Warranty
    5.0
    Technician showed up in quoted time frame. Was very professional and friendly. Explained all aspects of the inspection and what was wrong with my furnace.
    - Doug R.
  • Vitt Heating & Air Conditioning Co Inc
    5.0
    Great!! Saved my life on one of the coldest days of the year I own a small business and our heat was broken They arrived within two hours and had it fixed the very next day I highly recommend this company!!
    - karen p.
  • Vitt Heating & Air Conditioning Co Inc
    5.0
    Boiler wasn't lighting on one of the coldest days of the year. The Tech from Vitt showed up that very day and quickly diagnosed a bad Spark Ignition Module. He replaced it and we had heat again. I would hire them again.
    - Nicholas D.
  • Vitt Heating & Air Conditioning Co Inc
    5.0
    Great! Identified the problem quickly, installed the new part, cleaned the furnace, and did a wonderful repair. Highly recommend and will definitely use them again.
    - Pam F.
  • Four Seasons Heating & Air Conditioning
    5.0
    They did good job-only issue was Tech forgot to turn gas back on and notice later in evening. Call the service in evening and assured me someone would be out in morning to check which they did Great service I will use them again for Spring AC check
    - Carl J.
  • Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning
    5.0
    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!
    - Chris R.
  • Anton's Air Conditioning and Heating
    5.0
    This company is first-rate! Abby and Lindsay on the phone were so helpful; Ronan Wensel diagnosed my needs and quoted the job. He was extremely pleasant and thorough and answered all of my questions! Next morning at 7:45, the crew was here for installation! (Tony, Aaron and the gang). Their office helped me with financing, too. I would highly recommend this company to anyone--now I know why they were rated so consistently excellent.
    - Debra E.
  • Choice Home Warranty
    5.0
    Great! I've used this company before with Choice and me and my husband really enjoyed the service that this gentleman did and wanted to use the same company because he had previously worked on a unit before.
    - C S.
  • Jerry Kelly Heating & Air Conditioning
    5.0
    Great. They were here within an hour & replaced next day. Price matched the estimate, the work space left clean & very professional. They answered all questions & I highly recommend them.
    - Debra A.
  • Thomas Hoffmann Air Conditioning and Heating
    5.0
    Thomas Hoffman was ver responsive, knowledgeable, and reasonably priced. Another technician from another company had already come out and said we needed a more expensive part to be replaced which was done and didn't help. Thomas Hoffman quickly diagnosed the problem and fixed it for a cheaper cost than the first person.
    - Joshua M.
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HVAC Contractors in O Fallon

Companies below are listed in alphabetical order.

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