Top-rated heating and air conditioning pros.

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

There are 8 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

3.80(
80
)
Approved Pro

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

3.80(
80
)
Approved Pro
Customers say: Quick response
338 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


"Jeff updated the water heater, "

Valeria S on October 2025

In business since 2005, you can rely on us to provide you with comprehensive heating and cooling services. Our locally and family-owned and operated business has over 25 years of experience in the industry.

"Jeff updated the water heater, "

Valeria S on October 2025


Avatar for Mr. Handyman Metro East

Mr. Handyman Metro East

4.86(
173
)
Approved Pro

Mr. Handyman Metro East

4.86(
173
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
212 local quotes requested

One call does it all!! .Mr. Handyman is the largest employer of home repair contractors in U.S. and Canada. For more than 15 years we've consistently hired experienced, reliable employees whose skills are further refined through technical and customer service training. All of our handyman service technicians are licensed and insured for your safety and theirs. That means you'll receive consistently high quality work from safe, reliable, professional handymen. Mr. Handyman's professionals arrive in nationally-recognized uniforms and branded vans that are stocked with every tool they'll need. Our on-time record is second to none, and we arrive ready to work. One phone call to Mr. Handyman hires professionals who complete your entire "To Do" list. Every task whether major or minor home repair is prioritized according to your needs. For all your major and minor home repair needs, call Mr. Handyman today!

"It went fast, clean and great."

Jai D on February 2021

One call does it all!! .Mr. Handyman is the largest employer of home repair contractors in U.S. and Canada. For more than 15 years we've consistently hired experienced, reliable employees whose skills are further refined through technical and customer service training. All of our handyman service technicians are licensed and insured for your safety and theirs. That means you'll receive consistently high quality work from safe, reliable, professional handymen. Mr. Handyman's professionals arrive in nationally-recognized uniforms and branded vans that are stocked with every tool they'll need. Our on-time record is second to none, and we arrive ready to work. One phone call to Mr. Handyman hires professionals who complete your entire "To Do" list. Every task whether major or minor home repair is prioritized according to your needs. For all your major and minor home repair needs, call Mr. Handyman today!

"It went fast, clean and great."

Jai D on February 2021


Avatar for Property Medic

Property Medic

5.00(
1
)
Approved Pro

Property Medic

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1409 local quotes requested

With a team of skilled and professional handymen, Property Medic specializes in high-quality drywall repair, interior painting, deck repair, and deck staining. We are dedicated to ensuring every customer is completely satisfied with our work and our transparent process. Our commitment to excellence means our knowledgeable staff will provide the highest quality service to transform your home with beautiful outcomes you will be 100% happy with.

"I really needed a handyman to do some smaller jobs for me. Property Medic was a great company to do them, quick, knowlegeable and friendly. I will call them if I need help again. A very good company in my experience."

Barb B on November 2024

With a team of skilled and professional handymen, Property Medic specializes in high-quality drywall repair, interior painting, deck repair, and deck staining. We are dedicated to ensuring every customer is completely satisfied with our work and our transparent process. Our commitment to excellence means our knowledgeable staff will provide the highest quality service to transform your home with beautiful outcomes you will be 100% happy with.

"I really needed a handyman to do some smaller jobs for me. Property Medic was a great company to do them, quick, knowlegeable and friendly. I will call them if I need help again. A very good company in my experience."

Barb B on November 2024


Avatar for The Steven Brand

The Steven Brand

4.86(
56
)
Approved Pro

The Steven Brand

4.86(
56
)
Approved Pro
Super Service Award
Customers say: Quick response
754 local quotes requested
1 years of experience

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

"Excellent service! Thank you "

Sheila D on November 2025

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

"Excellent service! Thank you "

Sheila D on November 2025


Design Tech Contracting

New on AngiNew on Angi
Approved Pro

Design Tech Contracting

New on AngiNew on Angi
Approved Pro
141 local quotes requested
21 years of experience

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 all the services we offer below and call -or- click to schedule an estimate today!

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 all the services we offer below and call -or- click to schedule an estimate today!


Razor Repair

No reviews yet

Razor Repair

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

No reviews yet

BIG BANG HVACR LLC

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

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Heating and Air Conditioning questions, answered by experts

HVAC pros recommend that you replace your AC filter every one to three months to maintain optimal indoor air quality and ensure your HVAC system operates efficiently. However, factors such as filter type, household size, and environmental conditions may influence the frequency of replacement. Regular filter changes help prevent debris buildup, maintain airflow, and prolong the life span of your air conditioning unit.

Running a window air conditioner unit costs about $0.06 to $0.88 per hour. Choosing the correct size air conditioner can help it run more efficiently.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

A power outage can damage your air conditioner, just like a power surge can damage any electrical device or appliance. In most cases, your circuit breaker or built-in surge protection on your AC unit protects your AC and just needs a reset. But in other cases, it might be that your AC compressor or capacitor was blown during the power surge. You’ll need to have an HVAC professional repair or replace any AC parts. 

ACs don't run on water. They're not connected to drain pipes or any part of your plumbing system. However, they need refrigerant to run. Refrigerant is a gas or liquid that has a low boiling point and absorbs the heat in your home. ACs need this in order to be functional and cool your home. If you suspect your AC is low on refrigerant, you need to contact a licensed HVAC professional. Refrigerant is a dangerous chemical that requires specialized training and permits to work with. 

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.

What do you need done? We’ll find top pros.
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