Boiler Service, HVAC Service & AC InstallationWilmette, IL, Morton Grove, IL, Lincoln Park, IL, Wilmette, IL, Park Ridge, IL & Skokie, IL

Guardian Heating & Cooling Service is your trusted HVAC provider in Wilmette, IL. Established in 1953, we understand the challenges of local weather extremes. We’ve customized our services to handle everything from sub-zero temperatures to high humidity. Our focus is on energy efficiency, reliability, comfort, and air quality. We strive to simplify system management, trim costs and deliver longevity from our efforts.

Dependable HVAC Repairs in Wilmette, IL

When you contact Guardian Heating & Cooling Service, you access a highly trained team of NATE-certified techs. As a Carrier Factory Authorized Dealer, we’ve been recognized as a 2021 Presidents Award winner and Comfort 24-7 Provider. Being choosy about the manufacturers we install, we offer a selection of unmatched innovations from Aprilaire, Honeywell, AeroSeal, Unico, and Carrier. There is no requirement we can’t fulfill to exceptional standards.

Give us a call for your heating & A/C services in Chicago, IL and surrounding areas!

Don’t hesitate to ask us about our multiple financing options. Get further information about our shield of Protection Maintenance Plan (SPP) with no signup fee and enjoy priority scheduling and a 30% discount on equipment repairs. Let us resolve concerns with any make or model of residential or commercial HVAC system and maximize performance. You’ve noticed our fleet of trucks throughout Lincoln Park, Skokie, Chicago, Niles, Evanston, Wilmette, Park Ridge, and Morton Grove, IL because we’re the best at what we do.

Boiler Replacement & Boiler Service in Niles, IL

Serving Chicago, IL and surrounding areas

Boiler Replacement ∴ Lincoln Park, IL ∴ Evanston, IL ∴ Morton Grove, 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
  • $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.

  • 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.

  • Matching Infinity System (Furnace, A/C, Stat)

    $500.00 Off*


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

    Expires: 06/30/2023

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!