Deljo Heating, Cooling & Plumbing

In Deljo Heating, Cooling & Plumbing's own words

Deljo Heating & Cooling provides expert HVAC services throughout Chicagoland to keep your home comfortable year-round. With years of experience in heating and cooling repair, installation, and maintenance, our team ensures your systems run efficiently and reliably. We make managing your HVAC stress-free, offering trusted solutions that protect your home’s comfort and value. Contact Deljo today to schedule service and keep your heating and cooling systems in top condition.

Trade

HVAC contractor

Business address

4300 W Bryn Mawr Ave, Chicago, IL 60646

Telephone

(773) 657-9989

Website

deljoheating.com

Hours

• MondayOpen 24 Hours
• TuesdayOpen 24 Hours
• WednesdayOpen 24 Hours
• ThursdayOpen 24 Hours
• FridayOpen 24 Hours
• SaturdayOpen 24 Hours
• SundayOpen 24 Hours

From the business's Google listing, checked Oct 2026

Register

IL register

Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.

Google Reviews

4.9 ★★★★★ (3443)

• Drew stopped by for the maintenance and he was amazing! He was thorough on his findings and recommendations. I love working with this company .

  Victoria C.★★★★★

• Deljo Heating, Cooling, & Plumbing responded to our call when poor quality air was coming into our home on a smoky day this summer via our ERV. The technician who came out was very polite and helpful, which was appreciated. He opened the ERV system, taped the openings closed with foil tape, and set the second-floor thermostat to the fan on position to filter the smoke. However, we were caught off guard by the final bill. While we understand paying the diagnosis fee (even though we were clear about the work we needed vs. a true "diagnosis"), the additional charges for a "minor repair" brought the bill north of $400. The repair simply consisted of applying foil tape and showing us how to take the foil tape off for fresh air to re-enter the home once the smoke dissipated. We appreciate the prompt service and the friendly technician, but charging over $400 for a simple tape application feels unreasonable. We expected more proportionate pricing for such a straightforward task.

  Tyler H.★★★★★

• I had an issue with my tub and was able to get someone out that day. Jorge was professional and efficient and a great job.

  Jeanna L.★★★★★

• Seamless experience and the technicians explained everything and left NO mess for us to clean up! They were very personable and patient with our inquiries as well!

  Heidi S.★★★★★

• I would leave six out of five stars if I could! My technician Jorge Dimitriadis 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 C.★★★★★

• I had a leaky HVAC unit in my attic with water coming down through my exhaust fan in my main floor bathroom. Called Deljo up since I had a service contract- unfortunately, they seem to have sent a sales rep rather than an actual technician. I was immediately was told my system was too old to fix and that I would need a whole system since the coils were old, the refrigerant is no longer available, etc. The tech went up and took a bunch of pictures without even trying to properly diagnose the issue and kept asking when they could have the sales team come by give me an estimate. The tech seemed to just looking over the notes written during my summer service a few months before. He didn't even have the courtesy to try to remove the water that was accumulating in the pan under my unit lol. A new system is an easy $10k+ nowadays so I rightfully declined and asked for a second opinion. I called my local HVAC company and surprise surprise- it was a simple clog in one of my lines. Evidently, Deljo either did not try to clear the line properly with a nitrogen flush during my summer service (I know this because they did not carry a giant nitrogen tank up to my attic like my local company did). The tech from my local company charged $150 to come out, but cleared the line for me free of charge. He even had to decency to wet vac out the water in the pan before he left. I had a horrible experience with Deljo, I learned my lesson and will stick to my local HVAC. Deljo evidently prioritizes sales first, disgusting but unfortunately not surprising.

  Justin J.★★★★★

• Such a great experience with Deljo after a poor experience with another company and ongoing hvac issues for years. I called on a Saturday morning and a human answered, which is sadly rare these days so it is worth calling out. The woman who answered was very kind and apologized she couldn't get someone there until first thing Monday morning, which was totally reasonable to me. On Monday morning, the tech confirmed what another company had concluded: I needed an evaporator coil replacement because of a leak, despite the unit only being two years old. Deljo replaced the evaporator coil on my heat pump but it still was not working right. They then sent a new tech out who had deep expertise in heat pumps and he discovered improper wire set up, which was essentially mixing cold and hot air at the same time, which meant the system could never fully get cold. This and the new coil has solved all my problems! So grateful and happy to not be melting in lukewarm "AC". The tech also asked me why I was running this eco plus program on my thermostat. I explained that I participate in hourly pricing, so I was trying to be smart about energy use. He explained that my heatpump itself is actually most efficient when it does its own thing, and running ecoplus mode on the thermostat was overriding the best possible mode of operation. I am so glad he caught this! Since his visit I have been so relieved to have a functioning system. 🙌 Will be loyal to Deljo in the future and not use any other company for hvac needs.

  Katie G.★★★★★

• I had a great experience with Deljo Plumbing & HVAC, and would definitely recommend them. I recently bought a new condo, and unfortunately, the AC wasn’t working properly. I contacted several HVAC companies, but ultimately decided to go with Deljo. Jim Carney came to my home, inspected the system, and took the time to thoroughly explain the different options available to me. He was extremely knowledgeable, patient, and never made me feel rushed. He also clearly explained the different payment and financing options, which I really appreciated. Another big reason I chose Deljo was their availability. We were having temperatures in the upper 90s, and I urgently needed a working AC. They were able to schedule the installation much sooner than the other companies I contacted. When the crew came to install the new furnace and AC, they were fast, professional, respectful of my home, and left everything clean when they were finished. Overall, I had a very positive experience from beginning to end. Great communication, professional service, and quick turnaround when I really needed it. I would definitely recommend Deljo.

  Maria P.★★★★★

• Courteous, honest, clean and efficient. They replaced a rooftop AC unit for our rental unit and everything was so smooth and at a reasonable price for quality equipment. Happy customer!

  Jenifer H.★★★★★

• Excellent service, great communication

  Kurt K.★★★★★

Read all reviews on Google

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