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Avatar for Hively Home Comfort LLC
Hively Home Comfort LLC
4.8(
47
)
Central A/C - Service or Repair

Serving O Fallon, IL and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

3 neighbors recently requested a quote
Recommended by65%of homeowners
Avatar for Aire Serv of St. Louis
Aire Serv of St. Louis
5.0(
5
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Service or Repair+1 more

Serving O Fallon, IL and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

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!

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26 neighbors recently requested a quote
Avatar for Allstar Carpet & Upholstery Care
Allstar Carpet & Upholstery Care
4.8(
44
)
Air Ducts & Vents - Clean

Serving O Fallon, IL and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

Allstar Carpet & Upholstery Care provide professional floor and upholstery cleaning services in Belleville, Illinois and surrounding areas. Our services guarantee a cleaner, fresher and healthier home or business. We know how vital your floors are to your environment; that's why we treat each job with the care and respect that it deserves. Our technicians are trained professionals who use the deep cleaning process and only the finest cleaning methods, equipment and agents that leading producers recommend. Our goal is to keep your home and business clean, smelling good, and inviting to all who enter it. We look forward to long-term engagements with our customers! \n\n

Response time8 hrs
Response rate89%
Recommended by97%of homeowners
Avatar for Morrison Plumbing, Heating, Air & Electrical Services
Morrison Plumbing, Heating, Air & Electrical Services
5.0(
6
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving O Fallon, IL and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Emergency services offered

Your home's plumbing, HVAC, and electrical systems keep your family comfortable and safe. When something goes wrong or you're ready to upgrade, Morrison Plumbing, Heating, Air & Electrical is the Metro East team that delivers same-day service, upfront pricing, and work you can count on.\n\nWe serve Caseyville and surrounding communities through hot, humid summers and cold Illinois winters. Our technicians are licensed, insured, and trained to repair and install heating, cooling, plumbing, and electrical systems so your home stays reliable year-round.

HVAC Maintenance
Air Conditioner
Heating Repair
AC Service
HVAC Repair

+6

39 neighbors recently requested a quote
Avatar for The Furnace Guys Heating & Cooling
The Furnace Guys Heating & Cooling
5.0(
7
)
Central A/C - Service or Repair

Serving O Fallon, IL and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

We pride our company on Reliability, Great Communication, Integrity, and Quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business!\n

Installation
Installation
Installation
Installation
Installation

+2

Response time30 mins
Response rate100%
Recommended by83%of homeowners
Avatar for Vital Electric Heating and Cooling, LLC
Vital Electric Heating and Cooling, LLC
4.3(
20
)
Central A/C - Service or RepairDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install+2 more

Serving O Fallon, IL and surrounding areas

Approved

In business since 2006

Emergency services offered

Small jobs welcome

"They were the only one that were able to come out on a Sunday. Found the problem and got our ac working during a heat advisory. Very satisfied with the results and will continue to use them again. Will recommend them to friends and family."
Full system install
Response time10 hrs
8 neighbors recently requested a quote
Recommended by82%of homeowners
Tiger Plumbing, Heating, Air Conditioning, & Electrical Services
3.4(
354
)
Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+1 more

Serving O Fallon, IL and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"By February 2012, less than a year after installation, I begin to have problems. So I called Mt Everest, and they come and fix things here and there, and I don't think much of it because other than the inconvenience of occasionally being too hot, it's not costing me too much money. =) Here are some of the receipts I could find... Mt. Everest - 2/16/12 - $194.12 Mt. Everest - 2/17/12 - $0.00 Mt. Everest - 2/18/12 - $0.00 --new company name-- Tiger - 1/22/13 - $210.00 (Became Club Member) Tiger - 8/16/13 - $0.00 Tiger - 5/16/14 - $0.00 (Waived/Warranty) Fast forward to October 2015, a little over four years after installation, I have a coolant leak somewhere that can't seem to get fixed, and Tiger has to keep recharging my "closed" system... the only difference is now I have to start paying for this service. (I guess Freon is expensive.) I start to panic because my family is undergoing financial hardships, and whatever money I once had went toward the air conditioner I purchased four years earlier. Thankfully, Tiger works with me on this, and I am grateful. However, they warn me that I will need to have the evaporator coils (???) changed out. EEEK! At this point, I am already $10,000 (plus) into this system, it is only four years old, and it is having major problems. Again, I have no money left, so I'm talking to lawyers, because from what I can understand from Tiger, it's a manufacturing defect, and now I have to pay Tiger tons of money (that I don't have) to fix something that shouldn't even be broken yet. (Warrenty still covered parts, but not labor.) Thankfully, Tiger comes through for me and I refrain from possibly taking legal action against manufacturers. On October 23rd, 2015, the coil gets swapped out. The technician thinks there might still be a leak somewhere, but nothing really comes of it. The parts are covered under warranty, Tiger is kind enough to waive the fee for labor. * * * * * The above gives Tiger five stars. I seriously had no money to pay them. I would have had to get a loan from somewhere. ...but... It is now July 18th, 2016, not even a year has passed since the installation of a new coil, and it is 74* in my house... I have the thermostat set at 70*. The temp coming out of the vents is around 68* - according to my meat thermostat. I have called Tiger, and we have an appointment for tomorrow. I fear that Tiger is going to tell me that I will need a recharged -- or new coils -- and I will have to pay them for service with money I still don't have. I'm praying everything still falls under a warranty. Pray for me, you all. I'll come update after my appointment and let you all know how it went. <3"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+5

324 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Middle Man Maintenance LLC
Middle Man Maintenance LLC
4.9(
16
)
Central A/C - Service or Repair

Serving O Fallon, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

Middle Man Maintenance LLC is a small business that is dedicated to helping you out, at half the price of big business'. My services include: heating and cooling, painting, flooring, fixture install, outlets, gutter cleaning, gardening or horticultural, as well as deck repair.

Response time1 day
Recommended by50%of homeowners
Avatar for ARCO Heating & Cooling
ARCO Heating & Cooling
New to Angi
Central A/C - Service or Repair

Serving O Fallon, IL and surrounding areas

Approved

In business since 1963

Free estimates

Warranties offered

For more than 60 years, ARCO Heating & Cooling has been the local HVAC company that residents and businesses turn to for their heating and cooling needs. What began as a small business has grown into a cornerstone of the St. Charles, St. Louis, & Illinois communities, providing dependable service designed to keep our neighbors comfortable year-round. As a family-owned, local HVAC company, we’re more than just a service provider—we’re part of the community. We live and work right here in the St. Charles, St. Louis, & Illinois Metro areas, so we understand the unique climate challenges our neighbors face. This local connection fuels our dedication to providing personalized service and dependable solutions that make life easier for our customers.

AC Data Plate
AC Wiring
AC Wiring 2
AC Voltage Readings
TitleAC Wiring 3

+20

Response time8 hrs
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Air Conditioning questions, answered by experts

To find a reputable HVAC company, start by researching providers in your area. Look for companies with mostly positive online reviews and check the Better Business Bureau’s website for customer complaints. Next, verify their credentials. Rule out any companies that aren’t licensed, as this is a requirement in some states and municipalities, and confirm they are insured. Once you have a shortlist, contact each professional to ask key questions: How many years of experience do you have? Do you hold any third-party certifications? Do you have experience working on my specific type of HVAC system or brand? Can you provide references? What is your per-hour pricing? Do you offer maintenance contracts for ongoing savings? Do you provide a warranty for your work?

NATE (North American Technician Excellence) certification is not legally required for HVAC technicians in most areas, but hiring a professional with this certification is highly recommended. NATE-certified technicians demonstrated their expertise and proficiency in different types of HVAC systems, offering assurance of quality service. It's a voluntary certification, yet it indicates a commitment to professionalism and ongoing training. Choosing a NATE-certified technician often means you're working with someone who is up-to-date on industry standards and best practices, which can lead to better service, energy efficiency, and long-term cost savings.

Your heating and cooling systems cost you the most on your electric bill and make up 50% of your bill on average. Your washing machine, dryer, oven, and stove contribute significantly to your electric bill as well. Lights, fans, and smaller electronics add up, but aren’t the biggest energy consumers. You can reduce your power usage by setting optimal temperatures on your thermostat and investing in energy-efficient appliances.

You should only run your dehumidifier in warmer months, such as spring and summer, to get the best performance out of your system. The air gets drier when temperatures drop in the winter months, creating less of a need for a dehumidifier. However, when to run a dehumidifier will depend on your local climate.

If your HVAC system's capacity doesn't match the required CFM (Cubic Feet per Minute), imbalances can occur. An undersized system struggles to maintain desired temperatures, leading to discomfort. An oversized system might short-cycle, wasting energy and causing temperature fluctuations. Properly matching capacity to CFM ensures efficient and consistent heating, cooling, and home ventilation system performance.

The O Fallon, IL homeowners’ guide to air conditioning services

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