How To Test A Blower Motor: A Fun And Easy Guide

How to Test Blower Motor With Multimeter (The Easy Way) from electrouniversity.com

Introduction

Have you ever experienced turning on your car's air conditioning on a hot summer day only to find out that it's not blowing cool air? Or have you noticed that your furnace is not producing enough heat during the winter? These issues can be caused by a faulty blower motor. In this guide, we will teach you how to test a blower motor, so you can identify the problem and fix it right away.

What is a Blower Motor?

Before we dive into the testing process, let's first define what a blower motor is. A blower motor is an electrical component that is responsible for moving air through the HVAC system of your car or home. It's commonly found in the air conditioning and heating systems, and it works by drawing in air and pushing it through the ductwork.

How to Test a Blower Motor?

Testing a blower motor is a simple process that can be done using a multimeter. Here are the steps: 1. Turn off the power supply - Before you begin testing the blower motor, make sure to turn off the power supply to the HVAC system. This will prevent any electrical accidents from happening. 2. Locate the blower motor - The blower motor is usually located in the air conditioning or heating unit. Refer to your owner's manual or consult a professional if you're not sure where it's located. 3. Disconnect the blower motor - Once you've located the blower motor, disconnect it from the power supply by removing the wires connected to it. 4. Set the multimeter - Set your multimeter to the Ohms setting. 5. Test the motor's resistance - Touch the multimeter probes to the blower motor's terminals. A good blower motor should have a resistance reading of between 0.5 to 5 Ohms. If the reading is outside of this range, it may indicate a faulty blower motor. 6. Test the motor's voltage - Set your multimeter to the voltage setting and reconnect the blower motor to the power supply. Turn on the HVAC system and check the voltage reading on the multimeter. A good blower motor should have a voltage reading of between 12 to 14 volts. If the reading is outside of this range, it may indicate a faulty blower motor.

Recommended Products

Here are some recommended products that can help you test your blower motor:

Product	Price	Description
Multimeter	$20-100	A multimeter is an essential tool for testing electrical components. It can measure voltage, current, and resistance, which are important in testing a blower motor.
Blower Motor Tester	$50-200	A blower motor tester is a specialized tool that can test the blower motor's performance. It can measure the motor's speed, current draw, and voltage, which can help diagnose any problems with the motor.
Wire Strippers	$10-30	Wire strippers are used to remove the insulation from the wires connected to the blower motor. This allows you to test the motor's resistance and voltage accurately.

Conclusion

Testing a blower motor is a relatively simple process that can save you time and money in the long run. By using a multimeter and following the steps outlined in this guide, you can identify any problems with your blower motor and fix them before they become more serious. We hope that this guide has been helpful, and if you have any questions or comments, please feel free to leave them below.