AC & Climate Control

Driving becomes a lot less fun when your vehicle’s AC isn’t working right. If your AC isn’t working as well as you are accustomed to, turn to AutoZone’s helpful AC repair articles to learn how air conditioning works, common problems for the system, how to diagnose air conditioning systems, and how to fix your AC.

Learn to Work on Auto Air Conditioning Systems

Your air conditioning system is constantly converting refrigerant from a liquid to a cold mist to a hot gas back into a liquid again. It does this over and over. When your car’s air conditioning system breaks down, this refrigerant leaks out, which is harmful to both the environment and your car. When you work on an air conditioning system, it’s important to do the complete job to prevent future A/C troubles. These guides will help you understand the components that get replaced when repairing a failed air conditioning system, as well as help to explain how all the individual components in the system work together to deliver cold air to you and your passengers.

AutoZoner and customer talking while standing over the open engine bay of a compact sedan

What is an ECT Sensor?

An engine coolant temperature sensor is used to determine how hot the engine coolant is. Learn how to find and replace an ECT sensor.

How to Flush Your Car's AC System

The air conditioning flush is a crucial maintenance task after certain AC repairs. Learn how this process works and how to do it on your own car.

What Does an AC Compressor Replacement Cost?

Your car's AC compressor is a crucial part of what makes your car's AC work, and if you have AC trouble on a hot day, you'll want to know more what it does, and how to replace it should it go bad.

How Much Does an AC Recharge Cost?

Low refrigerant levels can prevent your vehicle's air conditioning from working properly, but that isn't the only thing you need to check. Learn about the costs of an AC recharge and related services.

How Your Car's Interior Heating System Works

Learn how this system works and what parts you should check on if your car won't blow hot enough air.

set of ac manifold gauges on top of an open OEM box

Get the Right Tools to Fix the Complete AC System

If you're starting a do-it-yourself air conditioning job, it's a good idea to take a look at the whole system.

How Your Car’s AC Works

AC systems do not actually create cool air. They cool the air by removing hot moisture.

Learn 3 Common AC Problems

Having your car's air conditioning go out suddenly can ruin your day fast. The most common causes of broken air conditioning are leaks or compressor issues.

How to Recharge Your Car's Air Conditioning

When an AC system loses its ability to cool properly, you may need to recharge it. Learn how to recharge your car's AC in 8 easy steps.

Man removing an STP max filtration cabin air filter from the packaging while sitting in the passenger seat of a car.

How to Change Your Cabin Air Filter

Changing your vehicle's cabin air filter only takes a few minutes and helps protect your lungs by keeping the air inside your vehicle clean. Filters should be replaced every 15,000 to 30,000 miles.