There's nothing more frustrating than turning on your air conditioner during a hot day-only to find that it's blowing warm air or not cooling at all. Whether you're a homeowner, renter, or facility manager, a malfunctioning air conditioner can disrupt comfort, productivity, and in some cases, health and safety.

This book was written to help you understand the common reasons why air conditioners fail to cool properly, and more importantly, what you can do about it. From dirty filters to low refrigerant, thermostat glitches to airflow blockages, many issues are simple to diagnose and can even be prevented with regular maintenance. Others may require the expertise of a licensed HVAC technician.

The goal of this book is twofold:

1. Educate you on the basic function and common issues of AC systems.
   
2. Empower you to troubleshoot minor problems and know when it's time to call a professional.
   

In an age where energy efficiency and indoor comfort are more critical than ever, understanding how your cooling system works-and why it might stop working-is no longer optional. Whether you're facing inconsistent temperatures, rising electricity bills, or complete AC failure, this guide will walk you through the causes, solutions, and smart preventive measures.

Let's begin by understanding how your air conditioning system actually works-because when you know the basics, solving the problem becomes much easier.