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Chicago Boiler Inspections, Maintenance, and Routine Service

Staying warm during Chicago winters is easy with a functioning boiler. When your boiler starts acting up, you might need more than just a few extra blankets to stay comfortable. With over 100 years of experience, Deljo Heating, Cooling & Plumbing has established itself as one of the premier heating and cooling companies in Chicago. So, it should be the obvious choice for boiler services and boiler inspections in the Chicago area.

An HVAC technician adjusts the pressure dial on a boiler.

Servicing Your Boiler

Just like any other part of your HVAC system, boilers need regular maintenance to function at maximum capacity. Many boiler-related problems develop after long periods of idleness. It is important to have your boiler serviced once every 12 months. This ensures your boiler and pressure vessels are working the way they are supposed to.

Without regular boiler maintenance, your boiler will become less efficient. It will consume more energy, and could even burn out long before its time. This could mean higher bills, costly repairs, or the need for a whole new system.

Common Boiler Problems

There are several signs that can indicate your boiler needs to be inspected soon. Some of the most common issues that require boiler service in Chicago include:

Low Boiler Pressure

Low boiler pressure is typically a nod to a malfunctioning central heating system. As the first step to boiler service in Chicago, our team will look for leaks. If none are found, we will re-pressurize your boiler so it can work properly again.

Banging or Whistling Noises

Noisy boilers are typically the result of air in the system, low water pressure, or a faulty pump.

Intermittent Heat or Hot Water

Broken diaphragms and airlocks, faulty valves, or a broken thermostat can cause inconsistent heat or hot water. Our team will be able to pinpoint the problem to help your boiler run smoothly once again.

Deljo’s Boiler Service in Chicago, IL

While our company is well known for its heating and air conditioning services, we also offer dependable boiler service, boiler maintenance, and boiler inspections for residential and commercial properties throughout Chicago. Avoid the hassle of emergency repair by having your boiler serviced at least once a year. Regular boiler maintenance will prevent small issues from becoming bigger problems.

We service all of Chicago and the surrounding areas and would love to show you the Deljo Difference. Whether you need boiler service in Lincoln Park or Logan Square, we encourage you to give our customer service team a call and schedule an inspection today!

For more information on our boiler services please visit our FAQ page here.

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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