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The ABCs of AC – How Central Air Conditioners Work

With our steamy hot Chicagoland summers, a central air conditioner is not just a luxury, it’s a necessity. Air conditioners work hard to keep our homes comfortable, but have you ever thought about how they work? Here’s a brief overview.

Split Systems

A typical central cooling system is a split system, meaning it consists of an outdoor unit housing a condenser coil and compressor, and an indoor evaporator coil, usually installed in conjunction with an air handler inside the house.

The AC Compressor

The compressor pumps a chemical refrigerant through the indoor evaporator coil. As warm air inside your home blows across the evaporator coil, the heat energy is transferred to the refrigerant inside the coil. It’s this transfer of heat that cools the air. The heat absorbed by the refrigerant is sent outside while cooled air is blown back inside. This condensing process also removes excess humidity from the air.

Air Ducts

A home’s ductwork is designed to distribute conditioned air throughout your home, air then returns to the air handler to repeat the process again.

Thermostat

The thermostat is the “brains” of the central heating and cooling system. Once the temperature is programmed, it maintains an even temperature. Some thermostats can be programmed to work on a schedule, saving energy when the house is unoccupied.

Have questions about your central air conditioner? Call ABC Plumbing, Heating, Cooling and Electric, we’re here to help.

Read What Your
Neighbors Are Saying About ABC
  • “Tom was awesome! He is very personable and explains the whole process well. He did a great job and ensured that he used 5-star service throughout the process. I will definitely use ABC and Tom again in the future for electrical work.”

  • “Bill showed up on time to repair our broken air conditioner. ABC kept in touch throughout the day to let me know time he would be arriving too. Bill was professional, friendly, helpful, and knowledgeable. We wound up signing up for monthly care package because Bill and ABC really made…”

  • “We were very pleased with the service performed by Brett Pack in performing the annual maintenance of our air conditioning unit. He noted it was low on refrigerant, which he then added after consulting with us. He also made sure we took advantage of all available discounts.”

  • “Tom did a super job fixing our electrical problem. He is one of the best electricians I have ever had in my home for repair work. I would highly recommend Tom and ABC Company if you need any type of electrical work. He took his time and explained everything and…”

  • “I am so impressed with Chris and ABC Plumbing, Heating, Cooling. His friendliness honest approach to his Job is remarkable. Thanks Chris for making my day and believing that they are still great honorable people out there.”

  • “Our AC was not working in the 90-degree summer heat. Josh identified that power was not going to the furnace blower. He identified that power was not going to the furnace breaker. His keen eye spotted that the wire leading into the breaker had frayed. He cut out the frayed…”

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