Top 10 HVAC Companies in O'Fallon, MO

Porch Pro Headshot Rick's Heating & Air Conditioning
HVAC Contractors
Serves O'Fallon, Missouri
(210)
"Now a days its hard to find a good company you can trust, we hear a lot of bad reports and complaints, I'm happy to say Rick was honest, respectful, and followed through with exactly what he promised. He showed up, cleaned up, and showed me my maintenance. i had a complete new HVAC system put in at...Read more about Rick's Heating & Air Conditioning
"Now a days its hard to find a good company you can trust, we hear a lot of bad reports and complaints, I'm happy to say Rick was honest, respectful, and followed through with exactly what he promised. He showed up, cleaned up, and showed me my maintenance. i had a complete new HVAC system put in at...Read more about Rick's Heating & Air Conditioning
Porch Pro Headshot AnC Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
(284)
"AnC replaced my mother-board on my furnace and cleaned it for it's yearly maintenance check. They get my repeat business as they are honest, trustworthy,professional, experienced and always make sure the customer is happy. I highly recommend them. I happy so very glad and relieved I finally fou...Read more about AnC Heating & Cooling
"AnC replaced my mother-board on my furnace and cleaned it for it's yearly maintenance check. They get my repeat business as they are honest, trustworthy,professional, experienced and always make sure the customer is happy. I highly recommend them. I happy so very glad and relieved I finally fou...Read more about AnC Heating & Cooling
Porch Pro Headshot Reliable Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
(100)
"Reliable is just that, reliable! Fair pricing and sensible repair/replace recommendations. Dependable after hours service. Clean installs. As an apartment manager, I've had PLENTY of experience with this company and many others in the St. Louis area. Reliable is the best by far."
"Reliable is just that, reliable! Fair pricing and sensible repair/replace recommendations. Dependable after hours service. Clean installs. As an apartment manager, I've had PLENTY of experience with this company and many others in the St. Louis area. Reliable is the best by far."
Porch Pro Headshot Williams Heating & Cooling, LLC
HVAC Contractors
Serves O'Fallon, Missouri
(83)
"I have had service through Williams Heating and Cooling LLC over the past 30 plus years. Service is reputable, dependable and professional. I had a system installed in my home just before I sold it, when my home went through the inspections for listings the inspector commented what a beautiful jo...Read more about Williams Heating & Cooling, LLC
"I have had service through Williams Heating and Cooling LLC over the past 30 plus years. Service is reputable, dependable and professional. I had a system installed in my home just before I sold it, when my home went through the inspections for listings the inspector commented what a beautiful jo...Read more about Williams Heating & Cooling, LLC
Porch Pro Headshot Siefert Mechanical
HVAC Contractors
Serves O'Fallon, Missouri
(57)
Siefert Mechanical is a professional HVAC company with years of experience in installation and repairs of heating and cooling systems. Let us show you how our company can help you save money while keeping complete comfort in your home today!
Siefert Mechanical is a professional HVAC company with years of experience in installation and repairs of heating and cooling systems. Let us show you how our company can help you save money while keeping complete comfort in your home today!
Porch Pro Headshot SMART St. Louis
HVAC Contractors
Serves O'Fallon, Missouri
(15)
SMART is a network of residential air conditioning & heating contractors that provide superior service to the St. Louis metro area. SMART Contractors provide maintenance, repair, replacement and design of residential HVAC units. Our focus is to help consumers reduce their overall heating and coolin...Read more about SMART St. Louis
SMART is a network of residential air conditioning & heating contractors that provide superior service to the St. Louis metro area. SMART Contractors provide maintenance, repair, replacement and design of residential HVAC units. Our focus is to help consumers reduce their overall heating and coolin...Read more about SMART St. Louis
Porch Pro Headshot All-Star Heating & A/C, Inc.
HVAC Contractors
Serves O'Fallon, Missouri
(19)
As the seasons change, we here, at All-Star Heating & A/C would like to offer you a friendly reminder that now is the time to have your unit(s) tuned-up by one of our certified technicians. Tune-ups on your HVAC equipment will ensure they are running at full efficiency. Even minor parts such as filt...Read more about All-Star Heating & A/C, Inc.
As the seasons change, we here, at All-Star Heating & A/C would like to offer you a friendly reminder that now is the time to have your unit(s) tuned-up by one of our certified technicians. Tune-ups on your HVAC equipment will ensure they are running at full efficiency. Even minor parts such as filt...Read more about All-Star Heating & A/C, Inc.
Porch Pro Headshot High Ridge Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
Is your AC or heating unit on its last leg? Do you need HVAC services before the seasons change? Rely on the experts at High Ridge Heating & Cooling for all of your heating and cooling needs. We offer complete HVAC service and installation for both residential and commercial properties. Our HVAC ser...Read more about High Ridge Heating & Cooling
Is your AC or heating unit on its last leg? Do you need HVAC services before the seasons change? Rely on the experts at High Ridge Heating & Cooling for all of your heating and cooling needs. We offer complete HVAC service and installation for both residential and commercial properties. Our HVAC ser...Read more about High Ridge Heating & Cooling
Porch Pro Headshot Advantage Heating & Air LLC
HVAC Contractors
Serves O'Fallon, Missouri
(8)
If you are looking for a top level heating and cooling service company at an affordable price then you have come to the right place. We can save you as much as 50% on repairs compared to our competition when you provide us with a written estimate for the same repair and we may be able to save you t...Read more about Advantage Heating & Air LLC
If you are looking for a top level heating and cooling service company at an affordable price then you have come to the right place. We can save you as much as 50% on repairs compared to our competition when you provide us with a written estimate for the same repair and we may be able to save you t...Read more about Advantage Heating & Air LLC
Porch Pro Headshot L K Mechanical HEATING AND AIR CONDITIONING
HVAC Contractors
Serves O'Fallon, Missouri
(5)
"Larry came to install gas logs we purchased from Lowes. He was very respectful of our home. He placed throws on the floor to protect the carpet and catch any debris. He cleaned up completely and thoroughly. Our logs were defective and we had to have Larry back out for a reinstall. I figured th...Read more about L K Mechanical HEATING AND AIR CONDITIONING
"Larry came to install gas logs we purchased from Lowes. He was very respectful of our home. He placed throws on the floor to protect the carpet and catch any debris. He cleaned up completely and thoroughly. Our logs were defective and we had to have Larry back out for a reinstall. I figured th...Read more about L K Mechanical HEATING AND AIR CONDITIONING

Top questions to ask before hiring an hvac company

What type of insurance do you have? Heating, ventilation and air conditioning (HVAC) professionals work on a variety of mechanical areas of the home. You'll want to ask specific questions regarding professional training and licensing, as well as what types of insurance they have (for example, mold, air pollution or worker's compensation). It's fair to ask for the dollar amounts they are covered and a quality professional will show you verification of coverage.

HVAC professionals attend to a home's thermal needs as well as air quality. Because of the technical aspects of HVAC work, find out the scope of work your professional can perform. You may only need your heating unit serviced however, if this professional also specializes in energy efficiency, mold assessment, or offer ways for you to save on energy costs, you may want to hire them for future projects. Because some equipment is gas-powered, your professional should be able to answer questions about installing gas lines and permitting.

Ask about guarantees on labor or warranties on parts for your HVAC project. It's common to have a time limitation on parts and equipment. Save any paperwork related to your project so you can refer back to instruction manuals or serial numbers.

When working with a heating and cooling professional, ask if their company offers pricing incentives to encourage you to hire them on a regular basis. It's common to have your equipment inspected and serviced at least once a year. Your HVAC company may also offer special pricing on filters, ventilation cleaning or energy assessments.

Regardless of the scope of your project, find out what you need to do to prepare your home for their visit. For example, the HVAC professional will need access to the areas in question and may need access to other mechanical or ventilation points. Make sure pets and children are kept out of the way. Ask if your project will involve removing dry wall or making any other structural changes – you may need to hire a professional drywall contractor to patch up HVAC work. If you are adding a unit that may contribute to carbon monoxide within the home, find out if you need to purchase a carbon monoxide detector.

Recent reviews for O'Fallon HVAC Contractors

46282

This is probably one of the worst companies I have ever dealt with.

- Roger Daily
11489

Their name says it all! Very reliable, always do a great job, and show up when they say the will. Highly recommend!

- Laura Michel
11625

Reliable is, as promised, reliable. They show up promptly, do the work you need give a fair price, and don't try to sell you services or goods you do not need. I would call them first for every HVAC or plumbing need.

- Margaret Wehrenberg
11601

Highly recommend; not only were they "reliable" & courteous, they also cleaned up! I will have them for all my heating and cooling needs.

- Anna Brandt
11490

Reliable Heating and Cooling is THE BEST! Their customer service is fantastic and they are so knowledgeable and HONEST with their estimates and service calls. I ONLY call Reliable.

- Allison Dolak
11672

There the best and very honest!

- Ralph Frank
11496

thank you for the honest and fast service... I would highly recommend

- justin hurayt
140037

We have recently had Lk heating out due to a warranty company, it took them three weeks to come to our hom and stated it was our compressor, they then left our house in absolute disarray and could not get our air working. After having another company come...

- Stephanie Michel
40352

Larry went above and beyond my expectations. I'm pleased I have found an HVAC contractor I can trust with many years of experience. I would recommend LK Mechanical!

- Jamie Lynn
39488

Larry has taken care of every problem I have had at my home and my parents home. He is fast reliable and does quality work. Explains everything in detail. Would recomend him to anyone.

- Jacob Coach
38730

L K Mechanical has always treated myself and my family well, he's thorough and explains what he needs to do and why

- mary schreck
191242

The Home Warranty company used sent this company to my parents house. I understand that it can be hard diagnosing a problem, however each service tech told my parents something different. The last tech didn't tell them anything, unplugged their unit fro...

- Nancy Chillers

Everything You Need to Know About O'Fallon HVAC Companies

What zip codes in O'Fallon have the best HVAC Contractors?

Below we've listed O'Fallon zip codes that have great selections of hvac contractors:

  • 63341: 3 HVAC Contractors.
  • 63367: 1 HVAC Contractors.
  • 63368: 2 HVAC Contractors.
  • 63385: 1 HVAC Contractors.
  • 63366: 3 HVAC Contractors.
  • How does invoicing/payment work for most HVAC Contractor projects in O'Fallon?

    Every project differs, but you should ask any hvac contractor for an estimate, before they do any work. In fact, ask for their general payment terms before any hvac work is done.

    If the job is large and going to take longer than a day, it's common practice for hvac contractors to request a down payment. Usually, this will be around 25% so they can commence work on your hvac contractor project.

    If it's a quick job, you'll likely be given an invoice/bill when the job is complete. Then it's up to you and the hvac contractor to determine if you pay immediately or can send payment at a later date.

    What should I check for once my HVAC Contractor in O'Fallon has finished working?

    Every hvac project is going to have different results, but here are a few things to check for once any hvac company has told you they've finished the job:

    • Obviously you want to do a visual inspection. Even if you're unfamiliar with hvac work, this gives you the opportunity to ask questions (even basic ones like, what did you do?).
    • Ask the hvac contractor to describe what they did. Whether your hvac project was a repair job or a building job, have them run you through what was done.
    • Compare the description provided on your hvac project estimate to the work completed. Did the professional do what was promised?
    • Request that the hvac contractor do a follow-up visit to check on the work. Most professionals are willing to do this, especially if you ask them.

    All HVAC Companies in O'Fallon, MO

    Porch Pro Headshot JT Dunn Climate Control  LLC.
    HVAC Contractors
    Serves O'Fallon, Missouri
    (1)
    Dunn Heating & Cooling is a full-service residential and commercial heating and air conditioning company committed to providing our customers with the finest professional service, installation, maintenance and indoor air quality at a fair price. From heating and cooling equipment installations, rep...Read more about JT Dunn Climate Control LLC.
    Dunn Heating & Cooling is a full-service residential and commercial heating and air conditioning company committed to providing our customers with the finest professional service, installation, maintenance and indoor air quality at a fair price. From heating and cooling equipment installations, rep...Read more about JT Dunn Climate Control LLC.
    Porch Pro Headshot AllBright Systems 2 LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    (13)
    AllBright Systems 2 LLC Bethalto, IL, 62010 (618) 401-1390 AllBright Systems 2 LLC offers professional janitorial services in Bethalto, IL. Do not hesitate to contact us right away! Professional Office Cleaning, Carpet Cleaner, Window Cleaning Service, Commercial Cleaning Expert Rosewood Heights IL...Read more about AllBright Systems 2 LLC
    AllBright Systems 2 LLC Bethalto, IL, 62010 (618) 401-1390 AllBright Systems 2 LLC offers professional janitorial services in Bethalto, IL. Do not hesitate to contact us right away! Professional Office Cleaning, Carpet Cleaner, Window Cleaning Service, Commercial Cleaning Expert Rosewood Heights IL...Read more about AllBright Systems 2 LLC
    Porch Pro Headshot Windows & the Works
    HVAC Contractors
    Serves O'Fallon, Missouri
    Windows & the Works
    Windows & the Works
    Porch Pro Headshot Astro Energy Solutions
    HVAC Contractors
    Serves O'Fallon, Missouri
    Astro Heating & Cooling is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the...Read more about Astro Energy Solutions
    Astro Heating & Cooling is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the...Read more about Astro Energy Solutions
    Porch Pro Headshot Sherlock Home Remodeling Agency, Inc.
    HVAC Contractors
    Serves O'Fallon, Missouri
    Complete residential remodeling with trade professionals in carpentry, hvac, electrical, plumbing, roofing, foundation repair. We are fully bonded and insured for homeowner protection. We also provide home inspections for real estate transaction. We specialize in Bathroom - Kitchen remodeling, ro...Read more about Sherlock Home Remodeling Agency, Inc.
    Complete residential remodeling with trade professionals in carpentry, hvac, electrical, plumbing, roofing, foundation repair. We are fully bonded and insured for homeowner protection. We also provide home inspections for real estate transaction. We specialize in Bathroom - Kitchen remodeling, ro...Read more about Sherlock Home Remodeling Agency, Inc.
    Porch Pro Headshot Fireplace and Grill Center
    HVAC Contractors
    Serves O'Fallon, Missouri
    (36)
    Porch Pro Headshot Complete Caire Heating And Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    (18)
    Porch Pro Headshot Roofnation LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Grand Oaks Heating & Cooling Inc
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Dawson Dodd
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot American Heating & Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Mike's Moonlighting Service
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Father and Son HVAC
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Ace Heating & Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri

    Latest projects near O'Fallon

    Recent projects booked on Porch
    Wentzville 63385
    Thermostat Replacement and Repair
    Comments from Customer
    Upgrading to a smart thermostat
    Wentzville 63385
    Thermostat Replacement and Repair
    Lake Saint Louis 63367
    HVAC Inspection
    Start Date
    Within 48 hours
    Purpose
    just a check up on heating an air condition
    Inspection type
    Heating and cooling
    Property type
    Single family residence
    Property size
    1,501-2,000 sq ft
    Property age
    11-20 years
    Foundation type
    Slab on ground
    Relationship to property
    Owner
    Occupied
    Yes
    Utilities turned on
    Yes
    Specific services
    None of the above
    O Fallon 63368
    Thermostat Replacement and Repair
    Comments from Customer
    I would like to get an estimate for an ecobee thermostat install