A Tradition of Excellence for over 70 years in Chicago and surrounding areas!

We, at Guardian Heating and Cooling Service, have made it our mission to serve you with the highest quality customer service and Carrier products.

Call today to schedule a service call or to request a free estimate on new equipment.

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AC Installation Niles, IL | Air Conditioning Maintenance Evanston, IL | Boiler Replacement Park Ridge, IL

Family owned and operated, Guardian Heating & Cooling Service specializes in residential and commercial HVAC services in Chicago, IL and surrounding areas, providing customized solutions to everyday challenges. We are large enough to handle your needs, and small enough to care. Contact us at 312-818-2840, speak with a knowledgeable and friendly representative of our staff, and let us help you improve the comfort, health, and control over your indoor environment. Through industry-leading equipment and skilled workmanship, we deliver results you can trust.

We have now opened a new office in Northbrook so we can better serve our Northshore customers.

Guardian Heating & Cooling Service, Inc. BBB Business Review

Expert Heating & Cooling Services & Repairs

Guardian Heating & Cooling Service offers a wide range of opportunities to enhance energy efficiency and maximize heating/cooling system reliability. Whether you’re considering new installation, retrofit, maintenance, or repair of anything from radiant floor heating to a furnace, boiler, heat pump, central cooling, snowmelt system, and much, much more, our factory trained and certified technicians are up to the task.

HVAC Service, AC Replacement, Air Conditioning Maintenance, AC Installation & AC RepairMorton Grove, IL, Niles, IL, Park Ridge, IL, Chicago, IL, Lincoln Park, IL & Evanston, IL

Trust in our team for all your HVAC repairs, maintenance & installations in Chicago, IL and surrounding areas!

We show up right on time, take pride in a job well done, and have developed the best maintenance plan on the market. For exceptional residential and commercial HVAC services, Guardian Heating & Cooling Service is the right choice for unmatched value throughout Lincoln Park, Skokie, Chicago, Niles, Evanston, Wilmette, Park Ridge, and Morton Grove, IL.

Boiler Replacement ∴ Air Conditioning Service ∴ Furnace Repair ∴ Air Conditioning Repair ∴ Boiler Repair ∴ Skokie, IL ∴ Niles, IL ∴ Wilmette, IL

Maggie Hays

21:05 09 Mar 22

I called Guardian Heating & Cooling because my Nest had lost power and my furnace wouldn't turn on. Sergio arrived within 1hr and quickly diagnosed & addressed the issue. He was very communicative and helpful throughout the whole process; I will definitely be working with Guardian again.

Paul A

21:18 24 Feb 22

When our heat went out during a particularly cold winter night, Guardian was very responsive in getting our furnace repaired same day. We were able to credit our repair expenses towards a new furnace to replace our aging system - great!Rory and Akeem did a great job installing our new furnace. They had great attention to detail and took the time to do the job right. We am very satisfied with the install.Everyone we interacted with from Guardian was polite and courteous. We would recommend them and plan to use them in the future!

james meiss

22:31 22 Feb 22

Very courteous and professional technicians. Took them me to make sure everything was in good working order before leaving. Also gave good tip for furnace filter product. I highly recommend Guardian!

Beth Skony

00:27 16 Dec 21

I just had a great service call on my boiler with Tyler from Guardian Heating. He was extremely thorough and professional, and he took extra time to answer my questions about my system and the possible addition of a smart thermostat. I’m happy to be with such a responsive and caring company after having some unpleasant experiences with a previous heating maintenance company. I contacted Guardian a year ago for a second opinion (based on a referral from another satisfied customer), and ultimately I needed a whole new boiler system and rerouting of some of the piping. They had the new equipment installed within a couple days of the diagnosis, and the installation techs and Jasper, my sales advisor, were wonderful every step of the way. I look forward to working with Guardian for many years to come!

Becca Richards

22:57 09 Dec 21

Guardian is very reliable and provides wonderful customer service. Sergio was recently at our home to manage a humidifier and heating issue. He was prompt and respectful. He was in a mask and immediately put booties on. He was careful in our home. He assessed the issue and communicated clearly is plan for fixing it. He was efficient and very clean. I would happily have him back anytime. Thank you so much!

AC Installation Niles, IL | Air Conditioning Maintenance Evanston, IL | Boiler Replacement Park Ridge, IL

Expert Heating & Cooling Services & Repairs

HVAC Service, AC Replacement, Air Conditioning Maintenance, AC Installation & AC RepairMorton Grove, IL, Niles, IL, Park Ridge, IL, Chicago, IL, Lincoln Park, IL & Evanston, IL

Trust in our team for all your HVAC repairs, maintenance & installations in Chicago, IL and surrounding areas!

Boiler Replacement ∴ Air Conditioning Service ∴ Furnace Repair ∴ Air Conditioning Repair ∴ Boiler Repair ∴ Skokie, IL ∴ Niles, IL ∴ Wilmette, IL

AC Installation

Boiler Replacement

Air Conditioning Repair

Furnace Repair

Air Conditioning Service

Boiler Repair

Skokie, IL

Chicago, IL

Harwood Heights, IL

Elmwood Park, IL

Melrose Park, IL

Park Ridge, IL

Morton Grove, IL

Oak Park, IL

Lincolnwood, IL

Niles, IL

Lincoln Park, IL

Franklin Park, IL

Evanston, IL

River Forest, IL

Schiller Park, IL

River Grove, IL

Wilmette, IL