Air Conditioner Repair, AC Installation & Boiler ServiceNiles, IL, Lincoln Park, IL, Skokie, IL, Chicago, IL, Niles, IL & Evanston, 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 68 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 (773) 231-9175 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 Wilmette, IL | Air Conditioner Repair Evanston, IL | AC Service Lincoln Park, IL

Serving Chicago, IL and surrounding areas

Boiler ServiceAir Conditioning MaintenanceBoiler RepairAC ServiceAC Installation ∴ Skokie, IL ∴ Evanston, IL ∴ Wilmette, 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
  • Free 2nd Opinion


    *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: 09/30/2021

  • $89 Clean and Check


    *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.

  • Mini-Split(Ductless) Installation

    $250.00 Off*


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

    Expires: 09/30/2021

What our clients are saying

Mo W.

Guardian is a top notch company and John is one of the most outstanding technicians I’ve ever worked with. He’s a trustworthy contractor who explains potential issues as he finds them, and breaks down the process of replacement so that anyone can understand it. I own 12 HVAC systems and I’ve seen more than my share of maintenance. I’ve used Guardian for years and these guys are simply the best.

Keith B.

Have used Guardian for years. Recently had a new furnace and central air installed and I couldn’t be happier. I really trust them because the workers are always extremely knowledgeable, good problem solvers, and they explain everything in terms I can understand. The guys are always very nice, and respectful, also. Highly recommend Guardian Heating & Cooling.

Laurie E.

Just had another great maintenance visit to prepare my old A/C units (2) for the summer. John was thorough and informative. Great job.

I have used Guardian Heating for over 15 years. And my original Rheem furnaces(zoned heat) are still running! I use their maintenance contracts to get reminders, advance scheduling and discounts on annual furnace and A/C checkups/cleaning. They are always quick to respond to a service request. I highly recommend them.

Installing the best and servicing the rest!