Top-rated air conditioning pros.

Best air conditioning pros near Mount Vernon, IL

Enter your zip and get matched with up to 5 pros

Need a pro for your air conditioning project in Mount Vernon, IL?

Select your specific project to find the pro for you.

Top-Rated Air conditioning pros in Mount Vernon - Updated Nov 2026

Avatar for Pass One Hour Heating & Air Conditioning
Pass One Hour Heating & Air Conditioning
5.0(
7
)
Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Mount Vernon, IL and surrounding areas

Approved

In business since 1971

Free estimates

Emergency services offered

"Had my spring maintenance done and couldn’t be happier with the service. The technician was on time, professional, and took the time to explain everything clearly they also swapped out my nest thermostat for an ecobee and got it set up. Everything is running great and I highly recommend Pass One Hour."
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system

+18

5 neighbors recently requested a quote
Avatar for Inventors Imaginarium
Inventors Imaginarium
New to Angi
Air Ducts & Vents - CleanWindow A/C Unit - Service or Relocate

Serving Mount Vernon, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

We take pride in delivering dependable, high-quality craftsmanship with honest communication from start to finish. Whether you're planning a small repair or a larger renovation, our goal is to provide durable, professional results that improve the value, function, and appearance of your property.\n\nOur services include residential construction, remodeling, repairs, renovations, demolition, framing, drywall, flooring, painting, trim and finish carpentry, deck and porch work, fencing, siding, roofing repairs, door and window installation, and general handyman services. We also handle property improvements, rental property maintenance, and custom projects tailored to your needs.\n\nEvery project is completed with attention to detail, quality materials, and a commitment to doing the job right the first time. We believe in treating every home as if it were our own by maintaining a clean worksite, respecting your property, and keeping you informed throughout the project. \n\nChoose us today!

4 neighbors recently requested a quote
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Mount Vernon, IL and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Avatar for Greathouse Mechanical, LLC
Greathouse Mechanical, LLC
5.0(
10
)
Air Ducts & Vents - CleanCentral A/C - InstallCentral A/C - Service or Repair+1 more

Serving Mount Vernon, IL and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"Greathouse mechanical came out at time promised, they were professional and knowledgeable. They serviced the air conditioner and showed me my optioned in replacing my heating and air units. I decided to go with another business. I recommend Greathouse, they are on the high side, but if you need someone right away, I would call them again."
Response time12 hrs
Recommended by100%of homeowners
Avatar for Rardin Plumbing Heating & A/C
Rardin Plumbing Heating & A/C
4.6(
11
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Mount Vernon, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Excellent service.  Oscar and his crew go far and above what is necessary to fix or replace plumbing.  They are very conscientious, courteous and respectful.  They are also very considerate of your property, taking measures to insure that floors are kept clean and all debris is removed when they leave.  I will hire Rardin Plumbing and Heating again, and I highly recommend them.
"
Recommended by100%of homeowners
Showing 1-10 of 40
Air Conditioning FAQs, answered by experts

The cost to replace an AC unit averages around $5,900, with a typical range between $3,900 and $8,020. The final price depends on several factors, including the type and size of the air conditioner, its efficiency rating, your geographic region, and labor costs for installation. Smaller units like portable and window ACs are much less expensive, costing between $90 and $550, compared to central or ductless systems. If your current unit is less than 10 years old, repairing it may be more cost-effective than a full replacement.

You need to know the square footage of your home first. Multiply that number by 20, which will get you the BTUs (British Thermal Units) needed to cool your home efficiently. Homes up to 1,000 square feet usually need a 1.5-ton unit; homes 1,000 to 1,200 square feet usually need a 1.75-ton unit, and homes 1,200 to 1,400 square feet usually need a 1.9-ton unit. Talk to a local pro for more specific advice on your home. 

A blockage in the ductwork may prevent air from flowing through the vent. If some rooms in your home are very hot or cold and another isn't, that can be a sign that a vent is blocked. Another sign of a blockage is a buildup of dirt or dust around the vent. In either case, a duct installer or cleaning service can investigate the issue for you and recommend a course of action.

Yes, you can build a deck over your outdoor HVAC unit, but you need to leave at least 5 feet of vertical clearance above the unit. If you don’t want your deck to be that high off the ground, you could build a floating deck in another part of your yard—again, as long as you leave at least 4 feet of horizontal space between the deck and your AC unit.

If your AC suddenly stops working, the first thing to check is your thermostat settings. Ensure the thermostat is set to the appropriate temperature and mode (cooling). Sometimes, a simple adjustment or replacing the batteries in the thermostat can resolve the issue. If that’s not the issue, look to see if the circuit breaker tripped. These basic checks can often identify simple fixes before you need to call for professional assistance.

The Mount Vernon, IL homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.