Air Conditioning


Miller's Area Heating is your #1 HVAC contractor in Grayslake, IL and the surrounding communities. We are the leading company for all of your air conditioning needs. If you need repairs, maintenance, or a brand new system installed, the technicians at Miller's Area Heating are the qualified and professional crew for the job.

We provide the highest quality service for your air conditioner. We also aim to educate and inform our customers. Informed decisions are good decisions. We want you to feel confident we are qualified to perform the service for which you are hiring us.

How Much Money Can a New Air Conditioner Save You?

Our SEER energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's SEER value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

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Air Conditioning Basics

The four main components to your air conditioner are:

Condenser: The condenser is the outside metal unit and where the gas from the compressor is condensed into a liquid. The gas entering the condenser is very hot. The temperature is then lowered, so the gas can convert back to a liquid.

Compressor: The compressor is inside the condenser. It circulates the pressurized refrigerant, to concentrate the heat, and changes the low pressure gas to high pressure.

Evaporator: The evaporator is the part of the system inside the home. In simple language, it absorbs the heat from your home.

Expansion Valve: The expansion valve controls the amount of refrigerant in your system.

All of these pieces are connected by a copper tube that handles refrigerant, creating a closed loop. Heat is collected in the evaporator, sent outside to the condenser. The heat is removed, and the cool air is recirculated back into your home.

AC Facts

An Air Conditioner Doesn’t Create Cool Air.
What happens in the AC process is actually the removal of heat from the air. Your AC uses a chemical called refrigerant to remove heat and transfer it outside. The warm air runs through the lines and coils in your unit and goes from liquid to gas and back again. During this process, the refrigerant removes the heat and transfers it elsewhere so that when the air comes out the other side, it is cool.

Your AC Will Remove Humidity.
Lower humidity helps the overall comfort level in your home by making you feel cooler, even if the temperature is the same.

Your Air Filter Needs To Be Checked And Replaced Every Three To Six Months.
(depending on the manufacturer’s recommendations)
A dirty air filter restricts your air flow, which reduces efficiency, costing you money, and over time can put stress on your unit and could cause a costly repair.

Maintenance, Maintenance, Maintenance.
Your air conditioner needs regular checkups to keep it running in tip-top shape. Having regular annual preventative maintenance will bring your system longer life and fewer breakdowns over all.

The Seasonal Energy Efficiency Ratio (SEER) measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.

At Miller's Area Heating, we provide all the services you need to keep your AC running in top-notch shape. Call us at 847-223-0211 for repairs, maintenance, or new-system installation.

Need Air Conditioner Service?

Contact the experts at Miller's Area Heating.

Call us at 847-223-0211!

Air Conditioner Repair in Lake Villa, IL 60046

“From the initial phone call, which recommended we turn the power breaker off to the air conditioner, to the actual repair, your service team did a great job. Your service rep checked everything, from the furnace, the air filter to the air conditioner. Through. He offered options for the repair, providing cost which was helpful. Great job, great service. Thanks.” – Richard M.

Air Conditioner Maintenance in Grayslake, IL 60030

“Excellent Service”

– Saravanan R.

Air Conditioner Maintenance in Gurnee, IL 60031

“Shane was very personable and thorough. It was a very pleasant experience.”

– Jorge D.

Air Conditioner Repair in Grayslake, IL 60030

“I continue to have excellent experiences with Miller’s Area Heating.”

– Quincy W.

Air Conditioner Maintenance in Gurnee, IL 60031

“Shane was helpful reviewing our issue and offered tips and ideas to manage ac better.”

– Brett B.

Air Conditioner Maintenance in Antioch, IL 60002

“Your company has always done an exceptionally good job for us. Today was no exception”

– Marv O.

Air Conditioner Maintenance in Grayslake, IL 60030

“Miller Heating is the best”

– Brent H.

Air Conditioner Repair in Grayslake, IL 60030

“After the recent severe storm our AC unit was making an odd noise at the main blower wouldn’t turn on. I called Miller’s “emergency” line at 11:00PM. I was concerned something on my new AC unit would burn out. Within 15 i was called by a tech. He walked me through shutting down the entire system. The next morning Millers called us and had a tech out. A series of power surges from the storm fried our blower motor module board. Millers found the equipment, had it delivered (same day) and got it installed. John Miller himself called me with the situation update. They knew the temp that day was well over 90. By 4pm our AC was back to functional and cooling down our house. Of course it was one of those “ouch” expenses that come with home ownership. But Miller’s rapid response to us was great. And they suggested we add a surge protector specifically for the furnace to block this equipment being fried by a storm again. We appreciate their quick response, or we would have been sweltering in our house. Staying with Miller’s.”

– Sara T.

Air Conditioner Repair in Grayslake, IL 60030

“Your tech came out after hours and was very knowledgeable and didn’t try to upsell. I felt like he was honest and services our unit fairly.”

– Jennifer B.

Air Conditioner Replacement in Lake Villa, IL 60046

“Prompt! Fantastic service! For these reasons, I always promote Miller’s to friends, family, and coworkers!

Thank you for your willingness to support us over the weekend and continued professionalism.

Karen and Tom Parra”

– Karen P.

Miller's Area Heating proudly provides HVAC service to Grayslake, Libertyville, Round Lake, Wildwood, Ingleside, and the surrounding Illinois communities. Visit our service area page for more coverage details, call us at 847-223-0211, or request service online today.