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Cooling

Questions About Your A/C? Contact Us Today!

AC Services

Chicago summers can be hot, humid, and unpredictable. When the temperature spikes, you want reliable AC services on call. For more than a century, Deljo Heating, Cooling & Plumbing has delivered trusted air conditioning services in Chicago, Illinois. From emergency cooling repairs to preventative AC servicing, our team keeps your home comfortable all summer long.

Our comprehensive offerings include everything from installation and maintenance to 24-hour emergency AC service in Chicago. Ready to schedule an appointment with one of our technicians? Call us or reach out online. Keep reading to learn more about our individual air conditioning services.

Repairmen works on a home's air conditioner unit outdoors.

Air Conditioning Repair

When your AC stops working properly, Deljo’s experts are ready to respond. We diagnose and repair all makes and models of air conditioners. Count on us to quickly restore your comfort.

HVAC technician uses special tools to test air conditioner during tune-up

Air Conditioning Installation & Replacement

A new air conditioning system will improve your home’s comfort and energy efficiency. Our team helps you choose the right system for your home and budget, then installs it to the highest professional standards.

Technician is checking air conditioner

Preventative AC Service & Tune-Ups

Prevent costly breakdowns and keep your system running smoothly with regular maintenance. Our comprehensive AC service includes cleaning, calibration, and performance checks to ensure maximum efficiency.

Furnace Maintenance

24/7 Emergency Cooling Service

Cooling emergencies can happen at the worst times. We recognize this, and that’s why we’re always here for you. Our emergency HVAC technicians are available around the clock to restore comfort when you need it most.

Ductless air conditioning unit on bedroom wall

Ductless Systems

Looking for an energy-efficient way to cool rooms without ductwork? Ductless mini-split systems offer flexible comfort with zoned temperature control and easy installation.

A technician stands close to an air conditioning unit,

Zone Control System

Take control of your home’s comfort with a zone control system that lets you adjust temperatures room by room. Zone control systems not only enhance your comfort, but also help you save on your energy bills. Discover the benefits of zone control

Truck

HVAC Maintenance Program

Keep your cooling system performing its best year after year with Deljo’s preventative maintenance program. Members enjoy priority scheduling, special discounts, and peace of mind knowing their system is in expert hands.

Stay Cool & Safe With Quality Cooling Products

Why Choose Deljo Heating, Cooling & Plumbing?

For over 100 years, Deljo has been one of the most trusted names in Chicago air conditioning service. Our licensed technicians always provide honest recommendations, fair pricing, and professional service. We take pride in doing every job right the first time.

Schedule Cooling Services Today

When you need help with cooling in Chicago, we're here to help. Call us today at 773-888-4229 for more information or to schedule same-day service. Our technicians will identify and address the root cause of your cooling issues.

Learn More About Your Home's Heating & Cooling

Frequently Asked Questions

When Do I Need To Repair My AC System?

When it is time to have air conditioner repairs done, you will probably notice some of the following signs: No cool air coming out of the vents, weakened air flow, or issues with moisture. For example, If you start to notice there is moisture forming around your air conditioning unit, you may be dealing with a refrigerant problem. When refrigerant leaks out of your HVAC unit, it will produce a lot of moisture. Our experienced technicians will be able to find and fix the refrigerant leak in a hurry.

Here are just a few of the ways the AC service we provide will protect and extend the life of your system: Check discharge pressure, Check amp draws on all electric motors, Calibrate thermostat, Measure refrigerant charge, Clean or replace the filter, Check and tighten all electrical connections, Lubricate motors, Clean condenser coil and condensate drain line, and Check overall system operation.

Schedule Cooling Services in Chicago, IL Today

When you need help with cooling in Chicago, we're here to help. Call us today at 773-888-4229 for more information or to schedule same-day heater service. Our technicians will identify and address the root cause of your cooling issues.

Client Testimonials

Read the opinions of our satisfied customers.

5 stars

This was my first time as a Deljo customer, and I was very pleased. My technician, Giovanni, was very thorough and diligent. He serviced my furnace and identified a faulty sensor that was causing the unit to shut itself down. Deljo ordered the part, and Giovanni replaced it a few days later. Overall, the team at Deljo was great. The dispatcher kept me informed about Giovanni’s arrival time, and the supervisor assisted Giovanni when he was diagnosing the problem with the furnace. I highly recommend Deljo.

Paul D. 10/15/2026

5 stars

I’ve used Deljo for over 10 years now and they always do a good job. Izzy was the technician for this visit and he did an excellent job with my winter maintenance on my multiple units in the household. He also addressed an issue while cleaning the furnace blower wheel. His communication was clear and concise with what he planned to do to address the issue quickly. He was confident and I had 0 concerns or questions. Great job Izzy!

Jeff S. 10/14/2026

5 stars

Paul was great! Arrived on time and completed maintenance on my humidifier, tankless water heater, and two furnaces. All work was performed under my Gold Star maintenance program, so all maintenance charges were covered. Paul did provide a few proposals for additional services on furnace & tankless water heater, but those were emailed to me for further consideration. Paul was friendly, knowledgeable, and answered all my questions.

Jack N. 10/12/2026

5 stars

Gabe did an excellent job with our annual service visit. He arrived in the early part of our service window, was friendly and knowledgeable, and got the work done in a very reasonable amount of time. I have great confidence in Deljo, and am a long-time customer.

Ruth C. 10/9/2026

5 stars

I’ve been using Deljo for 20 years for HVAC but now venture into enlisting their plumbing services. Bashar was very courteous, efficient & informative, and I’d definitely request him again for the next plumbing job. Great experience!

Christopher R. 10/2/2026

5 stars

Working with Deljo is always a good experience, and today’s appointment with Izzy was no different. He was able to come early which actually worked better with our schedules, but called me ahead of time to make sure that was okay. He was friendly and knowledgeable when he explained the work he had done during his visit and our options for fixes. He was also able to schedule a quote appointment for us while he was still here. We would highly recommend working with Izzy and the Deljo team!

Lauren H.  9/25/2026

5 stars

Drew performed the seasonal maintenance on my AC. It needed some repairs and updates and he was able to fix everything at the same appointment. He also noticed issues with the hot water heater and we were able to get ahead of that, as well.

Emily W. 9/11/2026

5 stars

I would leave six out of five stars if I could! My technician Jorge went above and beyond on his service. There was buildup in the rental property’s toilet from the previous tenant. One maintenance person did a surface level job of cleaning but did not fully remove the obstruction. Jorge went above and beyond and came to a solution and even explained the perpetual problems older toilet models can cause. Moving forward with this insight, I can perform my own upkeep the previous tenant did not. Thank you kindly!

Kayla K.  9/15/2026

5 stars

We just had our new boiler installed by Jonathan and Carlos. First rate work! They arrived on time, removed the old boiler, installed the new unit, and explained the features. Both guys were pleasant. Bring on the cold this winter! We are ready thanks to the team from Deljo.

Edward B.  6/26/2026

5 stars

Deljo’s heating and cooling team was awesome to work with. As a first-time homeowner, I really appreciated how clearly they explained everything and answered all my questions. From the quote to the install and follow-up, the service was top-notch. Highly recommend!

Lindsey A. Chicago, IL

5 stars

Matt did an amazing job. He serviced our home and our rental property. He gave us options to help our systems run more efficiently. He also told us about Deljo’s new plumbing inspection which was very affordable. He is great!

Jordan R. Chicago, IL

5 stars

We had a problem with our Humidifier and called Deljo. Jesus came out to help and was amazing. He was extremely knowledgeable, detail oriented, and super courteous. Amazing customer experience!

Jeff C. Chicago, IL

5 stars

Jordan and Jesus were extremely helpful and knowledgeable! We would 100% work with them and have them back. They were both very professional and efficiently fixed our heating system.

Emily L. Chicago, IL

5 stars

Shout out to Ernesto for coming out and servicing our furnace and air con. Deljo provides a great service and glad to trust them with our HVAC for our small business.

Lauren H. Chicago, IL