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Protecting Your Comfort Since 1953

Chicagoland's Trusted Local
Cooling Experts Heating Experts Boiler Experts

Guardian Heating and Cooling has proudly served Chicago and surrounding suburbs since 1953

Our Services

Heating and Cooling Solutions For You

Cooling

Stay comfortable all summer long with reliable AC solutions designed for your home.

Heating

Efficient heating systems and expert service to keep your home warm when it matters most.

IAQ

Breathe easier with solutions that improve the air your family breathes every day.

About Us

HVAC Repair and Installation | Guardian Heating & Cooling

Since 1953, residents of Chicago and the greater Chicago area have been calling Guardian Heating and Cooling for all of their comfort needs. As a locally owned and operated business, your satisfaction and comfort are always our top priority. For over 73 years, Guardian has continued to offer excellence in each installation and in every service provided. The factory authorized and professionally trained team at Guardian are highly experienced in all aspects of residential heating and cooling services, including new design/installation, equipment upgrades, seasonal maintenance, and skilled repair of all makes, models and styles of heating and cooling systems. As industry leaders, our focus is always on providing the best solutions.

Comprehensive Heating and Cooling Services

Experience the Guardian Difference with our 100% satisfaction guarantee on all residential heating and air conditioning (HVAC) installations. Our local, certified HVAC professionals are equipped with the latest technology in service, maintenance, installation, and testing to ensure optimal performance and efficiency. We provide rebates and flexible financing options to fit your budget, making comfort more accessible. With industry-leading training, certifications and affiliations, our team delivers top-tier expertise you can trust. Choose Guardian for reliable, high-quality HVAC solutions backed by a promise of excellence.

Our Specials

Take A Look At Our Limited Time Offers

$500 Off Furnace Installations

Not valid with any other offers. May not apply to equipment located in crawl spaces or attics. Must present coupon at time of service. Not valid on prior purchases. Expires 8-31-26.

$500 Off Cooling Installations

Not valid with any other offers. May not apply to equipment located in crawl spaces or attics. Must present coupon at time of service. Not valid on prior purchases. Expires 8-31-26.

30% Off Any Repair*

*Only available with purchase of a maintenance agreement. Cannot be combined with any other offers. Must present coupon at time of service. Offer expires 5/15/2026

$35 Off Service Repair

Not valid with any other offers. With this coupon. Not valid on prior purchases. Not valid on diagnostic without repair. Coupon must be presented at time of service. Offer expires 5/15/2026.

0% Financing up to 72 Months

For up to 72 months with approved credit and on qualifying systems only. Cannot be combined with other offers. See company representative for all details that may apply.

$149 Tune-Up and Cleaning

Not valid with any other offers. Must present coupon at time of service. Price per unit. Excludes boilers. May not apply to equipment located in crawl spaces or attics. Scheduling restrictions may apply. Limited spaces available. Ground-level residential equipment only.

Industry Leading Service and Craftsmanship

For over 73 years, we have been dedicated to providing reliable service, expert craftsmanship, and unmatched customer care. Our loyal clients has allowed us to grow, evolve and continue serving our community with the highest standards.

(312) 818-2840

Frequently Asked Questions

Got questions? You’re in the right place. We’ve put together this section to give you clear, straightforward answers to the things people ask us about most often. Whether you’re looking for what to do if your pipes froze or what else you can do to cool down the house, you’ll find helpful information right here.

Take a moment to browse through the FAQs to get quick answers without scheduling an appointment. If you don’t see what you’re looking for, click the button below to see all of our frequently asked questions. We’re always happy to help and make sure you get the information you need.

Why is my AC icing up?

Typically, this means one of two things 1) Low airflow. This could be dirty filters, closed registers, undersized ductwork, blocked register by furniture or carpeting. 2) Low on refrigerant. This means you have a freon leak. You should never have to top-off or add freon to an air conditioner. You never add freon to your refrigerator and you’re a/c system is no different. If you add freon, you have a leak.

Why don’t you have R22?

R-22 is a refrigerant used for many years that is now banned from production in new systems. If you have a R-22 system and need to add refrigerant, we recommend a system evacuation and all new MO-99 refrigerant added or replacing the unit with a new R410a system. Both options meet today’s requirements for the environment.

Do you work on window AC units?

No we do not. We only service whole house central air conditioners and mini-splits.

This heat wave is extreme. What else can I do to cool down the house?

Limit your door opening. Do not use your setback thermostat. Close all shades/blinds. Make sure your filter is clean and all registers are open. Try to avoid using the stove/oven…a great excuse to order out food.

What is carbon monoxide and is it dangerous?

Carbon monoxide is an invisible, unscented and at high levels can be a deadly gas. Lower concentrations of carbon monoxide can cause headaches, lightheadedness and fatigue. Winter months may pose health and safety risks with heating systems. Poorly maintained chimneys and flues may release carbon monoxide and other harmful gases into the air. If your home is heated by gas, coal, or oil you are required to install a carbon monoxide detector according to Chicago Ordinance.

What is variable speed?

Variable speed is fairly new technology that is built into blower motors. It is now code for all blower motors to be variable speed. Old PSC motors ran much hotter with limited speed settings. Variable speed runs much cooler and at drastically lower amps and have the ability to ramp up and down to variable speeds depending on your systems daily needs. These blower motors can save several hundred dollars per year.

Unmatched Warranties and Guarantees

At Guardian Heating & Cooling, we stand behind our work and products. We offer unmatched warranties and guarantees to give you the assurance that we are here for you today and well into the future. Our commitment to quality and customer satisfaction is unwavering, and we go above and beyond to ensure that your HVAC system operates at peak performance. Our maintenance program is designed to prolong the life of your equipment and prevent costly breakdowns. By regularly servicing your HVAC system, we can identify potential issues before they escalate, saving you time and money in the long run.

Service Area

Local HVAC Experts.
Here When You Need Us.

From the city to the North Shore and surrounding suburbs, Guardian Heating & Cooling is proud to deliver dependable service and exceptional comfort to thousands of local homes and businesses.

Need HVAC Service In Your Area?

For exceptional residential and commercial HVAC services, Guardian Heating & Cooling Service is the right choice for unmatched value throughout Chicago, Northbrook, Lincoln Park, Skokie, Glenview, Highland Park, Wilmette, Niles, Morton Grove, Glencoe, and Winnetka, IL. Contact us today for your local HVAC experts today!