HVAC Blower Motor Guide

The blower motor is one of the most important parts of your HVAC system, which means it’s crucial to know as much about its purpose as possible. This component is essentially responsible for powering the hot and cool air throughout your system. Use our guide below to learn more about this important HVAC part.

HVAC Blower Motor Functions

HVAC blower motors are types of fans that are used to circulate air through a heating or cooling system. These motors come in different sizes and speeds, which can be used for both residential and commercial applications.

The squirrel cage blower is the most common type of blower motor used today. This motor has a series of fins on the outside, helping move air throughout the system. Squirrel cage blowers are typically found in air conditioners and furnaces. This motor can be controlled by thermostats, timers, and speed controls.

The inline blower is another type of blower motor. These blowers are mounted directly to the ductwork of a heating or cooling system. More intricate than squirrel blower motors, they are commonly used in larger systems.

Blower motors are undoubtedly an essential piece of any heating or cooling system. They can be used in a variety of applications in homes or businesses.

Where Is The Blower Motor Located?

The exact location of the blower motor may vary depending on the type of system and model. In the majority of cases, the blower motor is located in the base of the unit next to the air filter. Most ACs and heat pumps feature a blower motor located in the air handler (typically with an AC and furnace).

Within a mini split system, each and every indoor unit will feature its own blower motor, which is usually located behind the air handler casing and between the fan blade and control panel. In some cases, the motor can be tucked behind several wires and parts. If you are having any issues locating your blower motor, it’s always best to contact the professionals.

Types Of Blower Motors

Let’s take a look at the most common blower motor types below.

Single-Speed

Single-speed is the most common blower motor type. They feature only one speed and are usually found in lower-end furnaces.

Multi-Speed

Multi-speed motors offer two or more speeds, giving the furnace more control as it heats the home. Higher-end furnaces typically feature multi-speed motors.

Variable Speed

Offering an infinite number of speeds, variable speed motors allow for precise heating and cooling. These motors are very energy efficient and can save users money on utility bills.

Bad Blower Motor Symptoms

If your home is not being cooled or heated properly, the blower motor may be to blame. Keep an eye out for these common signs of a bad blower motor:

• Unusual noises or smells coming from your HVAC unit.
• System overheating.
• Higher energy bills.
• Weak or no airflow whatsoever coming from the vents.

What Causes A Blower Motor To Fail?

A bad blower motor may be the result of several different issues, including the following:

• Debris.
• Moisture buildup.
• Old age.
• Electrical problems.
• Temperature control issues.
• Blower motor fan or resistor trouble.