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Cooling System Maintenance, Installation & Repairs: Everything You Need to Keep Your Cool

Our licensed HVAC technicians offer all the cooling services you need to keep the air conditioner in your Chicago home running efficiently all summer long. We are proud to offer our air conditioning service in Chicago and the northwest suburbs, including Crystal Lake, Arlington Heights, Elgin, Schaumburg, Aurora, Naperville, and Woodstock.

If your cold air goes out on a blazing hot day or your cooling system is making a noise it shouldn’t, we offer 24/7/365 emergency serviceWe have two locations to provide faster service.  We’re here for you.

Air Conditioning Maintenance & Repair

Regular maintenance can help keep your AC running reliably and efficiently all summer long. Take advantage of our preventative maintenance services to keep your cooling bills down and help prevent unexpected breakdowns. We recommend scheduling routine AC maintenance every year in spring to help ensure your system is ready for the scorchers ahead.

When your air conditioner malfunctions or stops working completely, you need cooling system repairs from our reliable air conditioning technicians. If your system stops blowing cool air, refuses to turn off/on or makes strange noises, our licensed technicians can find and fix the problem fast.



Air Conditioner Installations & Upgrades

Our HVAC technicians offer timely cooling system installations and upgrades. We understand that when you need a new or replacement air conditioner installed, you need it right away. Our air conditioning technicians will arrive at your home on-time to install your new air conditioner. If you are unsure as to the type or size of A/C unit you need, our Comfort Specialists can recommend new, energy efficient models that will meet or exceed your cooling expectations.

More About AC Installations

Cooling Systems & Equipment

Our licensed HVAC technicians offer energy-efficient air conditioners with SEER ratings of 13 to 18 or more so that you can save energy and money on your summer cooling bills.

  • Trane Air Conditioners
  • Aprilaire, Honeywell and Ecobee Thermostats

Additional Components:


Experience You Can Trust for Residential HVAC Service

Althoff has been taking care of customers in the Greater Chicago area for nearly 60 years.

  • Family owned and operated
  • Licensed, insured and bonded
  • Professionally trained technicians
  • True 24 hour service
  • Live phone operators and staff
  • Employees drive marked vehicles and wear a uniform & ID badge
  • We quote firm prices upfront
  • Free estimates on equipment replacements
  • Quality brands and products you can trust
  • Ongoing training in our state of the art training lab
  • We clean up when we’re done
  • Variety of payment options available
  • Satisfaction guaranteed


"Matt knows our systems and definitely knows what he is doing. We have total confidence when he leaves that everything is done correctly."

~ T.S from North Barrington, IL


"Althoff's is a very good company who always gives great service and timely service by well-trained technicians. We are delighted to do business with this company!!"

~ R.G. from Crystal Lake, IL


"The tech was on time, efficient, and extremely knowledgeable. I would definintly use this individual again, if or when I need this kind of help."

~ M.S. from Crystal Lake, IL


Let Our Customers Tell You How Great We Are

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