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HVAC Tune-Ups

 

Deljo tech conducting HVAC tune-up

At Deljo Heating, Cooling & Plumbing, we perform full-service HVAC tune-ups throughout the Chicago area, including Glencoe and Arlington Heights. Many homeowners wait until part of their HVAC system breaks before calling for help. However, you can save time and money by scheduling regular HVAC tune-ups.

When you call Deljo for an HVAC tune-up, our technicians will fully inspect and optimize your system. This will:

  • Prevent breakdowns
  • Help you save on energy bills
  • Extend the life of your system

We can tune up any part of your HVAC system, including your AC, furnace, boiler, or heat pump.

AC Tune-Ups

Chicago summers can be brutally hot, and you need an air conditioner that can keep up. Our air conditioning tune-up services are designed to maximize your system’s performance and energy efficiency.

During AC tune-ups, we carefully inspect components like the condenser coils, refrigerant lines, and electrical wiring. We also clean out debris, check the system’s airflow, ensure proper drainage from the condensate line, and calibrate your thermostat.

This thorough attention helps prevent AC failures, ensuring your home stays cool when you need it most. Whether you’re in the heart of Chicago or the surrounding suburbs, our team is ready to provide dependable AC tune-up services.

Furnace Tune-Ups

When winter rolls into the Windy City, your furnace becomes the heart of your home. Our furnace tune-up services ensure your heating system is ready for the season.

We begin each furnace tune-up by cleaning and examining critical components like burners, flame sensors, and the heat exchanger. Then we test the ignition system and safety switches to ensure proper function. We also assess airflow, lubricate moving parts, and replace filters if needed.

This proactive service helps your furnace run more efficiently, reduces the risk of carbon monoxide leaks, and increases your system’s lifespan. If you’re searching for a trusted provider for a furnace tune-up in Chicago, Arlington Heights, Glencoe, or beyond, Deljo Heating, Cooling & Plumbing is the name to know.

Other Heating Tune-Ups

Deljo offers comprehensive maintenance for various heating systems, including boilers and heat pumps.

During boiler tune-ups, we inspect the ignition system, pilot light, and pressure settings. Our technicians examine all mechanical components to ensure safe, reliable operation. We also flush the system to maintain efficiency and remove sediment buildup.

When servicing heat pumps, we inspect the reversing valve, test both heating and cooling modes, clean coils, check refrigerant levels, and verify defrost cycle operation. Since heat pumps operate year-round, scheduling regular tune-ups is very important.

Why Choose Deljo for Your HVAC Tune-Up?

Since 1922, Deljo Heating, Cooling & Plumbing has been dedicated to helping Chicago-area homeowners stay comfortable year-round. Our technicians are NATE-certified and we believe in doing business with honesty, transparency, and a deep commitment to customer satisfaction.

When you schedule an HVAC tune-up with Deljo, you get more than a routine check. You get a team that treats your home with care and delivers long-term value through detailed, reliable service.

Book Your HVAC Tune-Up Today

Avoid mid-season breakdowns and rising utility bills by scheduling a professional HVAC tune-up today. Whether you need an AC tune-up, furnace tune-up, or a full system inspection, Deljo Heating, Cooling & Plumbing is here to help. Call us today at (773) 829-4295 to learn more or schedule an HVAC tune-up.

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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

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