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Reliable Heat Pump Repair Services in Chicago

Heat pumps are one of the most energy-efficient ways to maintain the temperature in your home. It works by transferring heat. So, when it’s hot in the summer, it pushes the warm air out. During the cold months, it brings heat into your home.

Heat pump systems are great, but when they stop working, your home can quickly become uncomfortable and, at times, dangerous.

Simple heat pump diagram showing how the condenser, expansion valve, evaporator, and compressor work together to transfer heat

3 Most Common Heat Pump Problems

Any number of things can go wrong with a heating and cooling system, but some problems are  more frequent than others. Here are three of the most commonly reported heat pump issues.

Blowing Cold on Heat

When the system is set to heat mode but blowing cold air, it might be low on refrigerant charge. Alternatively, it could be a valve or compressor issue, or a coil may be clogged.

Frozen

During the winter, heat pumps can freeze for a few reasons. The defrost cycle may not be working properly or the system might be low on refrigerant charge. The outdoor unit may be blocked, water may be dripping and freezing, or the fan may not be working.

In summer, issues can be due to the inner coil or line leading to the compressor freezing. The unit can also freeze if there is insufficient refrigerant or the air filter is clogged.

Never Stops Running

If your heat pump runs nonstop, it may be due to a frozen coil, compressor issue, refrigerant leakage, or a dirty filter or coil.

One of the best ways to prevent issues is to have your system regularly maintained and to change your air filters monthly.

Heat pump technician servicing outdoor unit

Heat Pump Repair – Chicago Area

You can generally expect your heat pump to last 10-15 years, depending on maintenance and care. All systems eventually wear out, however, and when your heat pump goes out, you need an experienced, trusted HVAC company you can count on.

Heat pumps require special care and expertise due to their multi-function design. The HVAC-certified technicians at Deljo Heating, Cooling & Plumbing have the skills and experience needed to properly diagnose and restore your system.

100 Years of HVAC Service

Deljo Heating, Cooling & Plumbing has been providing stellar HVAC service to Chicago residents for over a century, and we are proud of the reputation we have earned. Our business was built on creating and maintaining relationships with our customers, and today is no different. We still treat our customers like family and strive to provide consistent, top-notch service with every visit.

When you need heat pump maintenance, repair, replacement, or installation services, you can rely on us. For all your HVAC and emergency heating or air needs, call on Deljo Heating, Cooling & Plumbing.

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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