Chicago, IL’s Dedicated Commercial HVAC Repair Company

If your heating or cooling system stops working during a busy workday, every minute counts. Uncomfortable customers may leave, productivity can drop, and that noise from the rooftop unit feels like money slipping away. You don’t have time to deal with a broken system. You need a team that arrives quickly, finds the problem, and fixes it fast. Luckily, Hayes Mechanical offers commercial HVAC repairs. We’ve kept Chicago, IL, buildings comfortable since 1918, and we’re available 24/7, every day of the year.

How to Tell You Need a Commercial HVAC Repair

Most systems give you warning signs long before they conk out completely. Catching them early usually saves you a bigger headache down the line, with less downtime and more control over your repair timeline. Keep an eye out for any of these common signs of impending repairs:

 

  • Weak or uneven airflow

  • Climbing energy bills

  • Strange smells from the vents

  • Constant on-off cycling

  • Banging, grinding, or rattling noises

  • Leaks or pooling water near equipment

  • Warm air when you want cold

  • Thermostat readings that don’t match the room

Project Gallery

Our Streamlined Repair Process
We’ve streamlined our repair process so you always know what’s happening. First, a technician checks out your equipment and finds the real issue. Before we start any repairs, we explain exactly what needs fixing and what it will cost—no surprises. Once you give the go-ahead, we get to work, test everything when we’re done, and make sure your system is running smoothly before we leave.

 

Learn About the Most Advanced Diagnostic Methods
Guesswork just wastes your time and money. That’s why we use proven tools and techniques to find the real problem quickly. We don’t use all of these methods for every repair. Instead, our technicians will use the most appropriate diagnostic technique for your specific problem. Here are some common diagnostic tools:

 

  • Thermal Imaging – Infrared cameras reveal hidden hot spots and failing components without tearing equipment apart.

  • Electrical Analysis – Meters and gauges check voltage and connections to find shorts, faults, and worn parts.

  • Airflow Testing – We measure pressure and circulation to catch blockages or duct issues that throttle performance.

  • Refrigerant Checks – We verify charge levels and hunt for leaks that quietly sap your cooling power.

Advantages of Timely Commercial HVAC Repairs
Waiting to repair your system usually ends up costing more. A small problem today can become a major breakdown later. Quick commercial HVAC repairs help lower your energy bills, extend your equipment’s life, and keep your team comfortable. When your space is comfortable, customers and staff are happier, and you have fewer emergencies.

 

Why Choose Hayes Mechanical for Commercial HVAC Repair
Hayes Mechanical has been doing this for over a century, and our experience shows in every job. Our team handles commercial HVAC repairs with the care you’d expect from people who have seen it all. Here’s what makes us different:

 

  • A Century of Experience – We’ve served businesses since 1918, building know-how no newcomer can match.

  • Skilled Technicians – Our crew brings real expertise to chillers, boilers, ductwork, and controls alike.

  • 24/7 Emergency Service – Your system doesn’t keep business hours, so neither do we.

  • Single-Source Solution – From repairs to preventative maintenance agreements, we handle it all under one roof.

FAQs About Commercial HVAC Repairs

How Fast Can You Respond?


We provide 24-hour emergency services every day of the year. Reach out to our office, and we’ll send a technician to you quickly.

 

Do You Service All HVAC Brands?


Yes. Our technicians work on a wide range of commercial systems, from air conditioning and chillers to boilers and burners.

 

Do You Offer Maintenance Plans?


We do. Our preventative maintenance services help you avoid breakdowns and keep commercial HVAC maintenance on schedule year-round.

 

What Areas Do You Cover?


Our Chicago office serves businesses across the area, with additional locations in Omaha, Phoenix, and Minneapolis. With our wide reach, we’re able to offer HVAC solutions to many areas. So, don’t hesitate to get in touch to see if we work with clients in your area.

 

Are You Available After Hours?


Absolutely. Our emergency line is open at all hours for urgent repairs. Better than that, we are vigilant and ready to assist our clients every day of the year. That’s right. We make sure someone is here to help you 24 hours a day, 365 days a year.

Schedule an HVAC Repair Appointment Now!
Don’t let a broken system slow down your day. Contact us today and let our century of experience work for your building. Let our diagnostic team find the root cause of your problem and start guiding you toward the best solution. Schedule your appointment today!

 

Locations

Chicago, IL:

(773) 784-0000 Office
(312) 259-5500 After Hours Emergency

Omaha, NE:

(402) 502-0299 Office
(402) 502-0299 After Hours Emergency

Minneapolis, MN:

(763) 568-7086 Office
(763) 568-7086 After Hours Emergency