Trusted Heating & Cooling Solutions in Mount Vernon

Dion's Heating & Air Services delivers reliable HVAC solutions tailored for both homes and businesses. From efficient AC repairs to professional heating installations, we keep your comfort in check all year round.

Get A Free Quote

Get a free Quote

Why Choose Dion's Heating & Air Services?

With 20 years of unparalleled experience, Dion’s Heating and Air is Mount Vernon, Missouri’s premier HVAC service provider. Our unwavering commitment to excellence ensures personalized, reliable solutions delivered with the utmost professionalism and a dedicated focus on your comfort and complete satisfaction.

Comprehensive HVAC Solutions

We offer a full spectrum of HVAC services for both residential and commercial properties, from meticulous installations and efficient repairs to thorough maintenance of heating, ventilation, and air conditioning systems.

Expertise Across All Major Brands

Our skilled technicians are proficient in working with all major HVAC brands, ensuring top-tier service. We also hold a special expertise in Amana products, guaranteeing specialized care.

Your Comfort, Our Priority


We prioritize your comfort and peace of mind above all else. Our service is built on reliability, clear communication, and meticulous attention to every detail of your HVAC system to ensure lasting comfort.

Rapid & Responsive Service

We understand that HVAC issues can't wait. Our team is committed to providing prompt and efficient service, with an average response time of 2 hours, ensuring your comfort is quickly restored.

The logo for wise tack is blue and has a bird on it.

Get Pre-Qualified Today!

At Dion’s Heating and Air, we’ve partnered with Wisestack to offer our customers convenient financing options. With Wisestack, you can easily break up the cost of your service into manageable monthly payments. The application process is quick, taking about a minute to complete, and checking your loan options won’t affect your credit score.

With Wisestack, you can finance up to $25,000 and choose from six different payment plans, including interest-free options for qualifying customers. There are no origination, prepayment, or late fees, and no compounding interest. The application is initiated by Dion’s Heating and Air and completed by you, ensuring a hassle-free experience. Now you can invest in your comfort without straining your budget.

*All financing is subject to credit approval. Your terms may vary. Payment options through Wisetack are provided by our lending partners. For example, a $1,200 purchase could cost $104.89 a month for 12 months, based on an 8.9% APR, or $400 a month for 3 months, based on a 0% APR. Offers range from 0-35.9% APR based on creditworthiness. No other financing charges or participation fees. See additional terms at http://wisetack.com/faqs.


A cell phone with a screenshot of a website on it.
An advertisement for amana heating and air conditioning
A man is working on an air conditioner on a roof.

Experienced and Skilled HVAC Solutions

Dion’s Heating and Air offers unparalleled HVAC expertise, proudly specializing in Amana’s reliable and energy-efficient systems. Our highly experienced and skilled contractors are proficient in the installation, repair, and maintenance of all major HVAC brands, ensuring exceptional service and consistent comfort for your home or business, regardless of your system.

A black and white drawing of the number 99 on a white background.

Testimonials

Discover what our satisfied clients say about the Dion's Heating & Air Services difference. Their experiences showcase our dedication to exceptional HVAC solutions and customer satisfaction.

Excellent service from the very start. The knowledge and experience displayed made me feel confident in our decision to use Dion's. Two units were replaced. Modifications we're required to improve airflow from our previous setup. The finished product was more efficient and aesthetically pleasing. From the laughing and singing it's obvious that they also enjoy their work.

- Jon Atwood

★★★★★

- PS VOLKL

★★★★★

I am SO PLEASED with the air conditioning service provided by Dion’s!!  They showed up quickly and at the time promised.  Work performed efficiently!!  Highly recommend!  A special thanks to the wonderful serviceman who performed the work!  Collin has a bright future with this company.  THANK YOU!!

Areas We Serve

  • Aurora
  • Monett
  • Marionville
  • Miller
  • Freistatt
  • Pierce City
  • Stotts City
  • Wentworth
  • Verona
  • Halltown
  • Ash Grove
  • Sarcoxie
  • Purdy
  • Clever
  • Billings
  • Chesapeake
  • Newtonia