19083 W. Casey Road
Libertyville, IL 60048
847-905-1608

Local Reviews

Rated 4.8 out of 5 stars based on 119 customer reviews

Outstanding Service from Beginning to End

We needed to replace our AC unit at our house but wanted to consider a combination replacement of our furnace and AC. Brian discussed our needs and available systems before preparing three options for us to review. Along the way, he answered numerous questions about the systems and the process. We never felt pressured and replies to questions were always prompt and courteous. Their price was competitive with other companies, and provided a custom tailored system as opposed to a more cookie-cutter approach. Brian and his team were very accommodating with our schedule to perform the replacement. Knowing our timetable, Brian even stepped out of his usual role as VP to help with the install because their team was short-handed on the day we needed the installation done. All services done in house were performed with the utmost professionalism. They even fixed some issues with our existing ductwork and caught some plumbing problems as part of the install. Nick spent time making sure that we were well-versed with how to operate the new system before leaving. We included a duct cleaning with our install and Ben's work was exemplary as well. From start to end, the Thornton's team was all we could have hoped for in an HVAC team. Having taken our time selecting a team for this job, I know the importance of relying on reviews to make a good decision. We would highly recommend Thornton's to anyone considering work for their home.

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Great service

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Great Service

Great Experience

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Great Sevive

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Thornton HVAC

Furnace Repair

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Ben is the best!

Ben was on time, friendly, and worked his butt off! My mom, who has allergies, noticed a difference in the air quality right away. Ben walked us through what he did and made recommendations in an informative, polite manner. We were impressed and would recommend the service!

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Excellent service, very pleased!

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Not Great

The technician recommended a fix that would have been very expensive. So, we sought a second opinion from a very experienced technician from another competitor. We found out that the fix being recommended by you was not necessary. We save much money

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I wouldn’t do it again!

Great technician but the technology they are using is not good. After he cleand my ducts the house was full of dust sitting everywhere.We were sneezing for 2 days. We had to spend another $350 to buy air purifiers and let them run nonstop! Over all, the company is great, their technician is excellent but the way they clean ducts is not the best way!!!

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Good service

The service technician was very helpful and took the time to explain what he was doing so that I can better understand my furnace and what he was inspecting

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Job Locations

Ben R.

Ben R. Job Checkin

Performed a precision tune up on two air-conditioners


Ben R.

Ben R. Job Checkin

Performed a precision tune up on two air-conditioners and cleaned one dryer vent


Mitch  W.

Mitch W. Job Checkin

Tune up ac


Mitch  W.

Mitch W. Job Checkin

Ac tune up


Mitch  W.

Mitch W. Job Checkin

Generator check


Nick  S.

Nick S. Job Checkin

Clean and check on rooftop units


Ben R.

Ben R. Job Checkin

Performed a precision tune up on one air-conditioner and performed a dryer vent cleaning


Mitch  W.

Mitch W. Job Checkin

Ac clean


Nick  S.

Nick S. Job Checkin

Clean and check on air conditioner and air cleaner


Ben R.

Ben R. Job Checkin

Performed a precision tune up on three air-conditioners and performed a dryer vent cleaning


Nick  S.

Nick S. Job Checkin

Water in ducts


Ben R.

Ben R. Job Checkin

Performed a precision tune up on one furnace


Mitch  W.

Mitch W. Job Checkin

New stat and repair boiler to make more efficient


Nick  S.

Nick S. Job Checkin

Get homeowner connected to my total connect


Nick  S.

Nick S. Job Checkin

Low humidity