HVAC Contractor in Crystal Lake –
All Temp Heating & Air Conditioning Inc.

After a long day at work, the last thing that you want to happen when you get home is to find out your air conditioner isn’t working. When this happens in Illinois, homeowners contact us for their emergency air conditioning repair in Crystal Lake. We are air conditioning experts that provide 24-hour services. Each of our technicians is NATE certified, and we provide full HVAC contractor services to meet the needs of our customers.

Heating Repair and Installation Services

Some of our most popular HVAC services are:

  • Air Conditioner

  • Air Conditioner Repair

  • AC Repair

  • HVAC Contractor

  • Furnace

  • Heating Company

  • Furnace Repair

  • Furnace Installation

  • New Furnace

  • And so much more…


  • Factory trained technicians who are NATE certified.
  • Our installation crews have years of experience.
  • Available 24 hours a day, 365 days a year.
  • As a leading Lennox dealer we carry the highest quality products.

We can work on any make and model of heating and AC units. We train in the latest technologies and maintain our knowledge at the highest levels of the industry.

Crystal Lake, Illinois

Crystal Lake is located 45 miles from Chicago and is the largest city in McHenry County with a population of 40,743. The city was named after the lake, Crystal Lake. The motto for the city is “A Good Place to Live”. The name for the city was originally Crystal Vile, then it was changed to its current name in 1840. The city has many different recreational activities to enjoy along with beauty and adventure. We did a job for air conditioning installation in crystal Lake – All Temp

The Three Oaks Recreation Area is a favorite location for residents and visitors. The Three Oaks Recreation Area has a swimming beach, scuba diving, fishing, boating, and walking trails, paddle boarding, sailboarding, a sled hill, and many more activities. Visitors can spend the entire day here and still wouldn’t be able to enjoy all the activities that are here.

The Dole Museum is a great place where visitors can learn about the history Crystal Lake. After visitors have gone to the Dole Museum they can go to the Gray Outdoor Theater to watch family-friendly movies under the stars. Visitors who are looking for a wonderful place to eat can stop by Tony’s Café, which is the home of the stuffed potato pancake and the pancake berry burrito. Around the Clock is another favorite restaurant in the city that has been in business for over fifty years. The Around the Clock offers home-style dinners, breakfasts, and a variety of sandwiches that are delicious. Adults that would like to relax with a cold one at the end of the day should go to Finn McCool’s, which is an Irish Pub located in downtown. You will have your thirst quenched with the different cocktails and beers offered here. Crystal Lake is an outstanding city with a lot going on.

All Temp Heating and Air Conditioning is the HVAC contractor that homeowners can depend on for all their heating and cooling needs. Call us for a free estimate and we’ll be glad to help.

Helping A Customer Decide Between Units

All Temp Heating & Air Conditioning Inc got a call from a homeowner who had one window unit in his previous apartment but had just moved into a small house and wanted to see what the prices might be for a central air conditioning installation in Crystal Lake. We set up a complimentary consultation with the homeowner and our professional team arrived promptly on time.

Estimate Provided by Our Qualified HVAC Contractor Team

We came out to his house and discussed the different options with him, including installing some new ducts so that the cool air would reach each room. We also showed him photos of different air conditioning units along with the brands. We wanted the homeowner to see what each brand and model could provide for his home. He was really impressed with our knowledge and enthusiasm, and he went ahead with the installation.

a customer used our barrington hvac contractor services for his ac unit installation

Our NATE certified technicians arrived on the morning that the air conditioning unit installation was scheduled for and start working on adding ducts in several of the rooms in the house. Once all the ducts were installed the techs began installing the AC unit. The techs worked throughout the day and by the early afternoon, the techs had the AC unit successfully installed.

The technicians turned on the air conditioner, then he showed the homeowner how to program the thermostat. The technician let the homeowner know that the air conditioning unit that he had selected is a high-efficiency unit that will save him money on his Air Conditioning costs. The technician explained that his AC unit also came with an outstanding warranty, so if he had any issues at all with the unit to just give us a call and we would come right out and take care of it.

The technician made sure the house was cool and comfortable before he started packing up and leaving. He asked the customer if he had any questions at all, and the customer didn’t have any questions, but he said he was very happy that his entire home would be cool instead of one or two rooms like when he used a window air conditioner.

The office representatives contacted the customer two days later to do a follow-up. The homeowner said the air conditioner was doing great and he was very pleased with it. The homeowner said he wished he would’ve done this a long time ago because it feels so good to be comfortable in every area of his home. He also told us that he was very impressed with our services and would call us again if he needed anything else.

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