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

Union homeowners rate heating and air conditioning pros in our network

4.6

(805 reviews)

Top-rated heating and air conditioning pros.

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Avatar for All Temp Heating & Air Conditioning Inc
All Temp Heating & Air Conditioning Inc
4.6(
433
)

Serving Union, IL and surrounding areas

Approved

In business since 1946

Free estimates

Emergency services offered

"This was our second call to All Temp for service. Mike was our technician and he is very knowledgeable and professional. He gave some good advice on cooling our house, what to look for in the HVAC system in a new house (we are looking), and didn't try to up-sell me on things we didn't need. He was quick with his assessment and work. We'll be calling them again if we have HVAC issues."
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+2

Response time3 days
17 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for G & R Heating & Air
G & R Heating & Air
4.5(
124
)

Serving Union, IL and surrounding areas

Approved

Super Service Award Winner

Free estimates

Emergency services offered

Warranties offered

"HVAC machine outside wasn’t working. Ricardo ? was so good at explaining & suggesting his expert ideas. There was a mouse & nest inside the machine & wires were severed. He removed the critter & nest & repaired the wires. All is working again. What a great guy he is!!"
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+20

Response time11 hrs
112 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for Perfect Temp Heating & Cooling
Perfect Temp Heating & Cooling
4.6(
198
)

Serving Union, IL and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Very responsive,!and got to my place within the half hour. Dave is personable, and appears to know HVACs. Will use for ongoing annual maintenance, as well..."
Duct Cleaning
Duct Cleaning
Duct cleaning
Duct cleaning
Duct cleaning

+79

Response time10 hrs
33 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Rest Assured HVAC, LLC
Rest Assured HVAC, LLC
4.9(
16
)

Serving Union, IL and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"When our air-conditioning went out during a stretch of 90 plus degree weather, Jeff answered our call and came out the same day to fix our unit! He also followed up to ensure we were satisfied with his service. We could not be more pleased with his service!"
Amana Gas Furnace
Amana Heat Pump
Response time5 hrs
2 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Lasco's Heating & Cooling
Lasco's Heating & Cooling
5.0(
23
)

Serving Union, IL and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"After a few years of using other heating and cooling businesses I found Keith, he was always on time and ready to work. We had a few issues with our boiler system that was getting up in age and he said he could fix it but it may only last a couple years so we decided to just replace it. Keith gave us a great quote and was again prompt and thorough on installing the new boiler. We were so happy with him that when we needed AC work he was the first one we called, which we ended up getting a new AC unit as well as it was old and could have been serviced over and over again but now the new ones are more efficient and almost pay for themselves. So when our water heater went out there was only one person to call, Keith was here as usual, quick and clean and no issues. Now we call and have both serviced regularly by him and no more problems and can rely on his work to keep us comfortable in our home. Call Keith if you donâ t want to worry about your homeâ s systems you wonâ t regret it."
Response time3 hrs
Response rate97%
1 neighbors recently requested a quote
Avatar for Miracle Mechanical Corp.
Miracle Mechanical Corp.
5.0(
14
)

Serving Union, IL and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"From start to finish, the HVAC installation went smoothly. The crew arrived on time, protected our floors, and explained each step of the process in plain language. They completed the job quickly, cleaned up thoroughly, and walked us through how to use and maintain the new system. The new unit runs quietly, cools/heats the house evenly, and has already made a big difference in our comfort and energy bills. I would absolutely recommend them to anyone needing a new HVAC system."
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+15

Response time5 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for The Handy Veteran
The Handy Veteran
5.0(
146
)

Serving Union, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Warranties offered

The Handy Veteran is a veteran owned and operated company. We offer free estimates and stand by our motto of professional and dependable services. We want to be the one stop shop handyman for you. We offer active duty and veteran discounts. BOOKED THROUGH AUGUST 2026, NOW BOOKING FOR FALL 2026!

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+5

2 neighbors recently requested a quote
Recommended by95%of homeowners
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FAQs for heating and air conditioning service projects in Union, IL

Knowing how long your existing HVAC units can last is essential to determine if you need a repair or replacement. Typically, most modern air conditioning units can last between 15 to 20 years, and most furnaces can work properly for 15 to 30 years. If your HVAC system is on the older side and you decide to replace one unit, it might make sense to replace both simultaneously to save on costs and future hassle.

While different HVAC contractors might offer higher or lower prices than competitors, the best time to replace your HVAC system is when customer demand is low. The beginning of summer and the beginning of winter bring the most demand for HVAC systems, so if you can, consider replacing your HVAC units in the early spring or fall. Many HVAC companies offer special off-season coupons that help lower the overall cost.  

The average cost to hire an HVAC contractor is between $50 and $150 per hour if charging hourly. However, some HVAC contractors will charge a flat fee by the type of service they are performing—for example, an inspection can cost between $150 to $500. Keep in mind that emergency repairs—which are made after business hours or around major holidays—generally cost more than scheduled repairs.

Yes, most states require HVAC technicians to be certified, and for good reason. Hiring an unlicensed HVAC technician could lead to poor quality work, costly future expenses, and potential code violations. 

As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved businesses meet our standards for certification which include: 

  • The owner, principal, or relevant manager passed a criminal background check

  • Required to have applicable state and local licenses

  • Maintain an average star rating of 3.0 or better on our network, if they have at least one review

  • Paying to advertise their services

  • Meeting any other eligibility criteria required by Angi

Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.

The average cost of HVAC repairs is around $350. However, that price can be as low as $100 or as high as $2,000 or more, depending on the repair. For example, replacing a capacitor is a relatively inexpensive repair, ranging from $100 to $500. However, a compressor repair is a more expensive repair, ranging from $750 to $2,000.  

The Union, 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.