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Verified Reviews for Air Conditioning pros in Mchenry, IL

*The Angi rating for Air Conditioning companies in Mchenry, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

*The HomeAdvisor rating for Air Conditioning companies in Mchenry, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

Last update on July 02, 2026

Find Air conditioning pros in Mchenry

Avatar for All Temp Heating & Air Conditioning Inc
All Temp Heating & Air Conditioning Inc
4.6(
433
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Mchenry, IL and surrounding areas

Approved

In business since 1946

Free estimates

Emergency services offered

"Good. AC needed freon. Will possibly replace in spring. If so, will definitely hire again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time3 days
Response rate100%
13 neighbors recently requested a quote
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Avatar for Mr Duct Chicagoland
Mr Duct Chicagoland
4.8(
863
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Service or Repair

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Warranties offered

"I have used Mr Duct for air ducts and vent cleaning for several years.They consistently provide great service at a reasonable price."
Residential Air Duct Cleaning
Mr. Duct trucks parked outside of a commercial air duct cleaning job site in Chicago.
A dryer vent before being cleaned by Mr. Duct.
A Mr. Duct technician cleaning a dryer vent at a pet salon
A Mr. Duct technician cleaning a furnace

+81

Response time1 day
21 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for G & R Heating & Air
G & R Heating & Air
4.6(
137
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

Free estimates

Emergency services offered

Warranties offered

"Dwayne from G & R Heating & Air did a very thorough job checking our AC system. He verified everything was in good working order. Dwayne was professional, courteous and friendly. I ended up purchasing the service contract."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time11 hrs
Response rate100%
118 neighbors recently requested a quote
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Avatar for CR Mechanical Services, LLC
CR Mechanical Services, LLC
4.7(
53
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Mchenry, IL and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Rick was very helpful with selecting my new central air and furnace system. I am still thrilled with the result."
Office furnace
Furnace for office
Office ac coil with damper
Shah furnace
Shah furnace

+8

Response time6 hrs
Recommended by96%of homeowners
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Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,293
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Mchenry, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"Our AC Replacement was done correctly and quickly. The Estimator and Installers were great!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
33 neighbors recently requested a quote
Recommended by86%of homeowners
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The Pure Air Experts
4.6(
130
)
Central A/C - Service or Repair

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Credit card accepted

Customers say: True professional

"Phil was the best. He arrived a few minutes early to the time agreed. He absolutely did an awesome job on cleaning a dryer vent that was in dire need of cleaning. He worked so hard and made sure the job / project was done not only to my liking but to his as well. I would highly recommend Pure Air Experts for any job. I am having him back in two weeks to do a tune up for my furnace. Awesome job Phil"
Response time5 hrs
Response rate100%
Recommended by92%of homeowners
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Avatar for Phoenix HVAC, LLC
Phoenix HVAC, LLC
4.8(
64
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+1 more

Serving Mchenry, IL and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Friendly reliable owners and staff. Work was completed when scheduled and professionally. New AC was installed with furnace. Since it was cold out, I was assured They will check outside condenser unit in the spring. Comforting to work with a good company."
Staging and Wrapping Ductwork
Staging and Wrapping Duct Work
Installation
OUR WORK
OUR WORK

+21

Response time9 hrs
Response rate92%
2 neighbors recently requested a quote
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Avatar for Perfect Temp Heating & Cooling
Perfect Temp Heating & Cooling
4.6(
198
)
Central A/C - Service or Repair

Serving Mchenry, IL and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"The men that installed the air conditioner unit were great!! They are very professional and we would use their services again!"
Duct Cleaning
Duct Cleaning
Duct cleaning
Duct cleaning
Duct cleaning

+79

Response time10 hrs
4 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for G & R Heating and Air, LLC
G & R Heating and Air, LLC
4.6(
1,158
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"they checked the central air to make sure it was in good condition ."
New 16 seer A/C
Old A/C
Old furnace
New Furnace
Water heater Installation

+1

Response time2 hrs
Response rate91%
330 neighbors recently requested a quote
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Avatar for ThermaTek Heating and Air
ThermaTek Heating and Air
4.7(
345
)
Central A/C - Service or Repair

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"It cost me $800 for recharging my ac unit and leak repaire"
Ac install
Ac install
Ac install
Ac install
Ac install

+16

Response time3 hrs
Response rate91%
21 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

The size window AC you need depends on the BTU and the size of the room you’re cooling. For a room with 8-foot ceilings, look for about 20 BTU per square foot of the room. For example, a 12-by-12-foot room should have an air conditioner with 2,880 BTU. You can buy something slightly more powerful, but don’t overshoot the BTU for a small room, or you’ll waste energy and have higher bills.

Replacing both an AC and a furnace takes a full day on average, ranging from eight to 12 hours. The process involves removing the old units, installing the new ones, and ensuring all connections are properly made. If both systems are being replaced simultaneously, it can take longer than installing a furnace alone, so plan accordingly.

Yes, you can run an attic fan with the AC on. In fact, you don’t have a choice with a passive attic fan. Plus, when an attic fan draws out hot air from the attic, it helps regulate the temperature of your whole home, so your AC doesn't have to work as hard.

There are ways to detect a refrigerant leak with several different testing methods. However, most homeowners can figure out something’s wrong with their AC unit by noticing these common signs:

  • Ice forming on the evaporator coil

  • Water leaks near the AC unit

  • Frequent hissing sounds

  • Increased electric bills

  • Unit takes longer than usual to cool

  • Unit is blowing hot air

You will enjoy greater energy efficiency and save on your annual energy bills, with new, modern HVAC systems using 30% to 50% less energy than older models. Upgrading your HVAC system is also a great way to embrace new technology, such as smart thermostats, lighting, fan speed, and humidity from your phone or tablet.

The Mchenry, IL homeowners’ guide to air conditioning services

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

See all articles