How much do you know about your home heating and cooling system? Considering the fact that your air conditioning and heating unit is the most mechanically complex piece of equipment in your home, having a basic understanding of how it works is important. Day in and day out the central heating and AC system serves the vital task of keeping your home cool in the summer and toasty during the frigid winter months.

Forced-Air Heating & Cooling System
Forced-Air Heating & Cooling System

Just like your car, every component is specifically designed to work in harmony with the rest. When something is out of whack, you’ll know it—the AC won’t cool or the heating won’t heat.


Arming yourself with a basic understanding of your heating and cooling system will help ensure your central air conditioning unit runs smoothly and efficiently for as long as possible. This knowledge will also save you money, allowing you to set your thermostat wisely and handle routine DIY maintenance instead of calling in an expensive HVAC contractor.

This HVAC resource guide provided by the Refrigeration School will get you up to speed on the vital components of your HVAC system. It will help you troubleshoot some of the most common problems and determine when you can handle an issue on your own, or when it’s time to call in the pros.

• Central AC Overview
Furnaces & Heating Systems
How a Central Air Conditioner Works
• What Is Relative Humidity and Why Is It Important to Your Home?
• AC Not Working | Central Air Conditioning Repair & Troubleshooting

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