High Efficiency Furnace Installation, Pre-Season Heating Maintenance & Heating System MaintenanceEvanston, IL, Niles, IL, Chicago, IL, Wilmette, IL, Skokie, IL & Park Ridge, IL

Heating System MaintenanceHigh Efficiency Heating System InstallationPre-Season Heating MaintenanceHigh Efficiency Furnace Installation ∴ Chicago, IL ∴ Lincoln Park, IL ∴ Niles, IL

High Efficiency Furnace Installation in Wilmette, IL | High Efficiency Heating System Installation Skokie, IL | Heating System Maintenance Chicago, IL


Guardian Heating & Cooling Service has been a staple of HVAC services across Chicago and the surrounding areas for 69 years. We know how to help you reduce winter utility bills. It all starts with the heating system. Modern options are simply more energy efficient than older models. If you’re dreading the cost of keeping a comfortable home, you might want to consider an update. As a Carrier Factory Authorized Dealer, we specialize in industry-leading technology to elevate comfort while minimizing expenses.

Are you taking good care of your heating system? Without regular, professional maintenance, performance steadily diminishes. Restricted airflow due to a buildup of contaminants will lead to longer run times, greater energy consumption and higher monthly costs. Minor issues left unresolved quickly turn into more expensive repairs. Guardian Heating & Cooling Service offers proactive services to achieve superior efficiency, reliability and longevity.

When Should I Change My Filter?

Filter changes are extremely important. The filter helps to protect the system from dust and other debris that builds up on equipment, hindering performance and reducing efficiency. You can also lessen demands on the heating system by tightening up the house. Make sure windows and exterior doors are securely closed and sealed tight. Check for cracks and crevices where heated air can leak out and drafts come in. Insulation, caulking and weatherstripping quickly pay for themselves!
Make an effort to lower the thermostat setting when you’re away from home or heading to bed for the night. Even small adjustments make a big difference. If you’re struggling to remember or reluctant to return home to chilly conditions, take a look at the convenience of a smart thermostat. Intuitive controls automatically adjust to your schedule, taking advantage of energy saving opportunities and providing maintenance alerts!

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Serving Chicago, IL and surrounding areas

High Efficiency Heating System InstallationPre-Season Heating MaintenanceHigh Efficiency Furnace InstallationHeating System Maintenance ∴ Skokie, IL ∴ Chicago, 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
  • Carrier Cool Cash is back!

    Carrier Cool Cash

    Up to $1,650 in rebates on qualifying equipment

    Please contact Guardian Heating & Cooling Service at 773-763-9224 for more information. Cannot be combined with any other offer. Promotion runs through 5/28/22.

    Expires: 05/28/2022

  • $99 Preventative Maintenance

    773-763-9224


    *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

    773-763-9224


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

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

    $500.00 Off*

    773-763-9224


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

    Expires: 05/31/2022

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!
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