top of page


Ultimate HVAC is an air conditioning repair specialist in northern Cook County, IL. 
There is nothing worse than finding out that your central air conditioner isn’t working properly on a hot summer day.
We offer around the clock residential or commercial emergency service!

Our US Environmental Protection Agency (EPA) and NATE certified, licensed and insured air conditioning technicians can service all major air conditioning brands. Our service vans are stocked with all the parts we are likely to need to get your system back up and operating.

Click the Armstrong Air and Ducane logos to learn more about the Air Conditioners we carry.

System Shield Ultimate HVAC Contractors Skokie IL .png
Businessman Working in Office

During every summer heat wave, our AC techs arrive at least a few service call where the problem could have been easily resolved by the owner. You can save stress, time, and money by checking these things before you call:

  • Make sure your thermostat is "ON", is set to "COOL", and the desired room temperature is set higher than the current ambient temperature.

  • Check you circuit breaker panel to ensure that your heating system breaker is "ON".

  • Make sure your "SYSTEM SWITCH" is set to "ON". This switch is typically a traditional toggle switch that may have a RED cover-plate.

  • Change your furnace filter and re-start your furnace.

  • Change your air handler or furnace filter.

  • If you thermostat was or the system power was off, after turning the system on give it a few minutes; many AC systems have a time-delay function on start-up.

  • If your system is blowing cool air, but not cooling as well as it should, check your outdoor unit to ensure there is nothing blocking airflow through the outdoor coil. PLEASE NOTE: Be very careful not to damage the fins on your outdoor coil and call us if you need help!

After checking these items, if your AC System is still not running properly call us day or night and we’ll dispatch a service tech to help! These are common air conditioning service items we help Skokie area homeowners with:

  • Air conditioning is not turning on or not cooling

  • Indoor temperature too hot or too cold

  • Some rooms are properly conditioned and some are too warm

  • Indoor coil or refrigerant lines covered with heavy frost or ice

  • Breaker to the outdoor unit tripped more than once

  • A vibration or odd noise with the outdoor or indoor unit

  • Thermostat not working properly

We will thoroughly evaluate your air conditioning system and prepare thorough job estimate.

Hands Repairing Air Conditioner
Cute Puppy

If your AC system is fine today but you want more peace of mind, consider our Comfort Club. Before teach summer, we’ll perform a complete air conditioning check. We’ll inspect your system, clean your indoor and outdoor coils, change your indoor air filter, inspect your refrigerant lines, and test run your system to ensure proper operation. A properly maintained air conditioning system is more efficient, more reliable, and will have a longer effective life.



Ultimate HVAC is local owned and has decades of experience providing water heater installation and service for Skokie area homeowners and businesses.

 Guarantee Peace of Mind

Ultimate HVAC is committed to your needs and satisfaction regarding water heating, HVAC or indoor air quality.

 Factory Trained

We have completed manufacturer training and are Navien® and A. O. Smith dealers.

We've been an Accredited Better Business Bureau member since 2017, and we are more than proud of our A+ BBB rating!

Nate Certified heating and cooling contractor.

Ultimate HVAC is EPA refrigeration and air conditioning certified.

Ultimate HVAC is licensed and insured to do furnace, boiler, air conditioning, and water heating work throughout Cook County.

bottom of page