Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in O Fallon, IL

There are 9 highly-rated local heating and air conditioning pros.

TRUSTED BY O FALLON, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon311
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in O Fallon

Avatar for Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
Approved Pro

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
Approved Pro
Customers say: Quick response
241 local quotes requested
32 years of experience

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025


"He responded very quickly and was able to come out and fix my mini split. I would recommend this company to anyone looking for a fair price and good work. Thanks again! "

Jackie K on October 2025

Good Service Heating and Cooling,LLC. Over 30 years of HVAC experience. Honest and affordable. Do it right the first time.

"He responded very quickly and was able to come out and fix my mini split. I would recommend this company to anyone looking for a fair price and good work. Thanks again! "

Jackie K on October 2025


Avatar for Middle Man Maintenance LLC

Middle Man Maintenance LLC

433 Douglas Ave
4.91(
11
)
Approved Pro

Middle Man Maintenance LLC

433 Douglas Ave
4.91(
11
)
Approved Pro
Customers say: Quick response
25 local quotes requested
1 years of experience

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.

"Taylor arrived when he said he would. Knowledgeable and fully prepared with all the tools and materials he needed for the job. Nice guy, easy to talk to and work with."

Randy C on September 2025

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.

"Taylor arrived when he said he would. Knowledgeable and fully prepared with all the tools and materials he needed for the job. Nice guy, easy to talk to and work with."

Randy C on September 2025


Razor Repair

5 Fieldcrest Drive
No reviews yet

Razor Repair

5 Fieldcrest Drive
No reviews yet
1 years of experience

Razor Repair is a family and disabled veteran owned A/C and Refrigeration Diagnostic and Repair service business, while also providing Applicance Repair and Gardening services. Our vision is to not only do the job right the first time and at a reasonable time but to pass on our savings to every customer at a 15% lower price than the national average.

Razor Repair is a family and disabled veteran owned A/C and Refrigeration Diagnostic and Repair service business, while also providing Applicance Repair and Gardening services. Our vision is to not only do the job right the first time and at a reasonable time but to pass on our savings to every customer at a 15% lower price than the national average.



Avatar for BIG BANG HVACR LLC

BIG BANG HVACR LLC

818 Lincoln Highway
No reviews yet

BIG BANG HVACR LLC

818 Lincoln Highway
No reviews yet
3 years of experience

BIG BANG HVACR is an HVAC (Heating, Ventilation, Air Conditioning) company that keeps clients "banging cool" or "banging warm" for the particular season. The company does an outstanding services on AC units, Refrigerators, Mini Fridge, Standard Freezers, Deep Freezers, Gas Stoves, Electric Stoves, Furnaces, Dryers, Thermostat Installations, Toilet Installations and does troubleshooting and maintenance repairs on non-working systems. I service St. Clair County, Madison County (Collinsville and Edwardsville), St. Louis County and St. Louis City. Anyone who lives outside of the target areas, must contact me directly before booking. Please make sure to book the correct service. Please note if you are using a credit card to pay for the remaining balance, there will be a 4% transaction fee through my booking site.

BIG BANG HVACR is an HVAC (Heating, Ventilation, Air Conditioning) company that keeps clients "banging cool" or "banging warm" for the particular season. The company does an outstanding services on AC units, Refrigerators, Mini Fridge, Standard Freezers, Deep Freezers, Gas Stoves, Electric Stoves, Furnaces, Dryers, Thermostat Installations, Toilet Installations and does troubleshooting and maintenance repairs on non-working systems. I service St. Clair County, Madison County (Collinsville and Edwardsville), St. Louis County and St. Louis City. Anyone who lives outside of the target areas, must contact me directly before booking. Please make sure to book the correct service. Please note if you are using a credit card to pay for the remaining balance, there will be a 4% transaction fee through my booking site.


Crump HVAC/R and Weatherization

5.00(
1
)

Crump HVAC/R and Weatherization

5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023


Avatar for 1st choice services

1st choice services

7431 Sieloff Drive
No reviews yet

1st choice services

7431 Sieloff Drive
No reviews yet
Emergency services offered

"For more than 15 years, First Choice services has provided both commercial and residential appliance repairs and hvac services in the Greater St. Louis area. We take pleasure in offering premium work at competitive prices. We service all makes and models. Our service technicians are skilled and qualified to carry out the task at hand. We provide trustworthy service with a quick response, when you are having issues with your appliances or hvac choose our company to be your first choice

"For more than 15 years, First Choice services has provided both commercial and residential appliance repairs and hvac services in the Greater St. Louis area. We take pleasure in offering premium work at competitive prices. We service all makes and models. Our service technicians are skilled and qualified to carry out the task at hand. We provide trustworthy service with a quick response, when you are having issues with your appliances or hvac choose our company to be your first choice


Avatar for Hofler Service Company LLC

Hofler Service Company LLC

5 Northbrook Circle Apt. 15
No reviews yet

Hofler Service Company LLC

5 Northbrook Circle Apt. 15
No reviews yet
2 years of experience

Hofler Service Company is a family-owned property management company operating out of the Fairview Heights area of Illinois. We specializes in General Maintenance, Cleaning, Installation & Repair of appliances/ hardware throughout your home, ensuring customer satisfaction guarantee.

Hofler Service Company is a family-owned property management company operating out of the Fairview Heights area of Illinois. We specializes in General Maintenance, Cleaning, Installation & Repair of appliances/ hardware throughout your home, ensuring customer satisfaction guarantee.


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Heating and Air Conditioning questions, answered by experts

Zoned HVAC systems can be worth it for some homeowners, even with the added HVAC replacement costs, because they offer tremendous benefits. Zoned HVAC may offer greater stability and efficiency if your home has multiple levels and experiences constant temperature fluctuations. However, even smaller homes without major fluctuations can benefit since zoned HVAC systems can adjust their temperature more quickly by heating and cooling only the spaces you need.

While 72 degrees is a comfortable setting for many people, it’s likely not the most efficient temperature setting for your air conditioning unit. By pushing the temperature up to 75 or 78 degrees, you stand to save money on your energy bill. That said, these temperatures may be too warm to be comfortable for some people and are definitely too warm for most people to sleep comfortably.

To keep your AC unit in good working condition, you should service your AC unit at least once per year. Your HVAC pro will inspect, clean, and replace parts as necessary. A great DIY option is to clean the evaporator coils every year, preferably before the summer months. Regular maintenance helps avoid costly repairs down the road.

If your home has an existing forced-air heat system, you can add a central air conditioner to it. An HVAC technician can retrofit your forced-air heating system by installing an evaporator coil onto the furnace plenum, the box next to the furnace that draws in air. Once installed, the air conditioning coils use the furnace’s blower to circulate the air.

It depends on the size of the space you’re cooling down. If you’re looking for the most affordable way to cool an entire house over a long period of time, then central air will be more cost-effective. But when it comes to cooling down a couple of rooms or one floor, a window unit may be the cheaper option, with both a lower cost to install and less energy used to run.

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

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