Air Conditioning Maintenance, Boiler Repair & AC InstallationNiles, IL, Wilmette, IL, Evanston, IL, Skokie, IL, Morton Grove, IL & Park Ridge, IL

Welcome to Guardian Heating & Cooling Service, where excellence is a certainty. Our NATE-certified technicians turn challenges into positives. We combine extensive training, experience, and determination to maximize every improvement opportunity. Through our efforts, you enjoy superior HVAC system efficiency, lower monthly costs, and enhanced air quality and comfort. Whether for residential or commercial services, we are your heating, cooling, and IAQ experts in Niles, IL.

Trustworthy Heating & A/C Services

Over our 70 years of service, we at Guardian Heating & Cooling Service have seen the benefits of preventative service. We use our experience and expertise to provide the greatest value. The result is our Shield of Protection Maintenance Plan (SPP) which has proven to boost equipment efficiency by as much as 25%. Priority scheduling, 30% discount on repairs, greater reliability, and longer system life are just a few of the perks.

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

Guardian Heating & Cooling Service is a Comfort 24-7 Provider and Carrier Factory Authorized Dealer. Drawing from such well-known manufacturers as Aprilaire, Honeywell, Carrier, AeroSeal & Unico, we cater to residential or commercial needs with the most sophisticated technology on the market. Contact Guardian Heating & Cooling Service at 312-818-2840 for new system installation, upgrades, upkeep, repairs, and convenient financing anywhere across Lincoln Park, Skokie, Chicago, Niles, Evanston, Wilmette, Park Ridge, and Morton Grove, IL.

Boiler Service in Skokie, IL | Boiler Service Wilmette, IL

Serving Chicago, IL and surrounding areas

Boiler ServiceBoiler Replacement ∴ Morton Grove, IL ∴ Evanston, IL ∴ Skokie, IL

Save today with our special offers

You love getting good deals, so here are some coupons to show our appreciation for considering us for your next heating or cooling installation or repair.

Special Offers
  • Mini-Split(Ductless) Installation

    $250.00 Off*


    *Restrictions apply. Cannot be combined with any other offers. Must present coupon at time of service.

    Expires: 06/30/2023

  • Save Thousands w/ Local & Federal Rebates

    Learn More

    *Scheduling restrictions may apply. Limited spaces available. Ground-level residential equipment. Cannot be combined with any other offers. Must present coupon at time of service.

  • $99 Preventative Maintenance


    *Scheduling restrictions may apply. Limited spaces available. Ground-level residential equipment. Cannot be combined with any other offers. Must present coupon at time of service.

  • Free 2nd Opinion


    *Cannot be combined with any other offers. Must present coupon at time of service.

What our clients are saying

Maggie HaysMaggie 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 APaul 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 meissjames 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 SkonyBeth 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 RichardsBecca 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!

Installing the best and servicing the rest!