Pre-Season Heating Maintenance, Heating System Maintenance, High Efficiency Heating System Installation & High Efficiency Furnace InstallationChicago, IL, Northbrook, IL, Lincoln Park, IL, Skokie, IL, Glenview, IL & Highland Park, IL

Heating System Maintenance in Chicago, IL | Pre-Season Heating Maintenance Northbrook, IL | High Efficiency Heating System Installation Lincoln Park, IL


Guardian Heating & Cooling Service has been a staple of HVAC services across Chicago and the surrounding areas for 71 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!

High Efficiency Heating System InstallationHigh Efficiency Furnace InstallationHeating System MaintenancePre-Season Heating Maintenance ∴ Morton Grove, IL ∴ Skokie, IL ∴ Northbrook, IL

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Serving Chicago, IL and surrounding areas

Heating System MaintenanceHigh Efficiency Heating System InstallationHigh Efficiency Furnace InstallationPre-Season Heating Maintenance ∴ Lincoln Park, IL ∴ Winnetka, IL ∴ Glenview, 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
  • Financing Special 0% financing for up to 60 months

    With Approved Credit. On Qualifying Systems only. Call Amber for details. Expires 12-31-24.

  • $1,500 off New System Installations

    Valid with Qualifying Purchase. Subject to change. See dealer for details. 6-30-24.

  • $500 off New Air Conditioner Installation

    Valid with Qualifying Purchase. Subject to change. See dealer for details. 6-30-24.

  • $50 off Service Repair

    Not valid with any other offers or on prior purchases. Not valid on Diagnostic without repair. Present coupon at time of service. See dealer for details. Expires 6-30-23.

What our clients are saying

Marcy Dotson
Marcy Dotson
Guardian heating and cooling is a great company. They have serviced us for over a year and we continue to get good service every time. keep up the good work.
Josephine Osowski
Josephine Osowski
Martin & Brian did an excellent job installing my new furnace & water heater. They arrived on schedule & kept me informed during the process. The entire area was cleaned and all trash removed before they left.
James Spillane
James Spillane
Great and expert service as always from Guardian. David was wonderful. Brian and Martin who did the installation were amazing, did a great job, did it with care and courtesy, and ensured everything worked before they left. Outstanding!
Robert H
Robert H
Great place and Sergio Morales solved the issue. Plus is professional and helpful. New issue Sergio Morales was is extremely helpful sharp and proficient.
Elizabeth Pollock
Elizabeth Pollock
I have used Guardian Heating and Cooling for regular maintenance and any major and minor heating and cooling issues at my home. The company representatives are consistently professional, responsive, and efficient.
John Mueller
John Mueller
I had to replace my old forced air gas furnace. Guardian's project manager Dave was great, he listened to my concerns and helped pick a new furnace with heat exchanger and air conditioning system. Miguel and Brian did a great job of installing the new system, hard working and conscientious. I can't say enough, thanks to everyone who helped!
Daniel Kim
Daniel Kim
This review is almost 2 years late! But I figure better late than never, and I have 2 years of data to back my review. We have radiant floor heating and were warned when we bought our house that it could be challenging to find people who know how to work with it. They were right, as we discovered when our obsolete hybrid boiler/tank needed replacing. One company ghosted me. When I called Guardian, Alen and Peter came and looked at our heating system. They identified what they thought needed to be done, but admitted that our system was a bit unique & complicated. So they called in the boss Jasper, who took a look, knew exactly what he was seeing, confident in what needed to be done (confirming what Alen and Peter had told us). I was impressed! It took Josh/Chris? and him team 3 long days to do the work, and the result was complicated work of art. After installation, there was a part-compatibility issue that needed addressed, which was taken care of. And over a year later, we realized that one of our eight heating zones wasn't working properly. Taso visited a few times to fix that. The project and boiler were not cheap. Honestly, we were in shock when given the estimate. But it was at the peak of the supply-chain issue; and the work was, as noted, very complicated; and the boiler is very modern and super-efficient. It was all worth it. Guardian was always very accessible and responsive, and never hid or made excuses when a few fixes were needed. And having confidence that Guardian knows what they're doing, do great work, and stand behind their work, means everything. 3/1/2024: Update: I have Guardian’s maintenance plan, which covers an annual checkup. Sergio and Burt were super friendly and professional, did an inspection, replaced a broken gasket, and cleaned the system. Much appreciated!
Jenna Nommensen
Jenna Nommensen
Luis was very thorough and did a great job. Thank you!
Bill Murphy
Bill Murphy
Great people to work with.

Installing the best and servicing the rest!