What Is a Blower Motor?

When troubleshooting HVAC problems, you may see the term “blower motor” and wonder how that fits into your system. This crucial part of your HVAC functions as the lungs of your heating and cooling system. The blower motor powers the circulation of heated and cooled air, ensuring your home stays comfortable all the time.

It’s not necessary that you know every detail of your HVAC system to keep it running smoothly. But, understanding at least something about the blower motor simplifies operation and occasional troubleshooting.

What Does a Blower Motor Do?

The blower motor in a forced-air heating and cooling system powers the fan that blows air around the inside of your home and forces it back into the HVAC for reheating or cooling. The kinds of HVAC systems that utilize blower motors include furnaces, air conditioners, heat pumps and ductless mini-splits.

When your thermostat detects the temperature falling out of the set comfort zone, the blower motor is notified to do something about it. This turns on the fan, blowing hot or cold air out of the unit, through the ductwork—or right from the air handler in the case of a ductless system—and into your living space.

Where Is the Blower Motor Found?

The blower motor’s exact location depends on the type of system:

  • A furnace blower motor is normally located in the base of the unit near the air filter.
  • An air conditioner typically shares the furnace’s blower motor to distribute cool air in the warm months.
  • A heat pump blower motor is located inside the air handler, the interior portion of this single-unit heating and cooling device.
  • A ductless mini-split blower motor is found in the wall-mounted unit, often behind the air handler casing.

Types of Blower Motors

Understanding the two main types of blower motors can help you select the best option for your home comfort needs.

  • A single-speed motor, as the name reveals, operates at one speed and turns off when the desired temperature is attained.
  • A variable-speed motor operates at a range of speeds, adjusting the speed to changes in heating and cooling requirements. This is generally the quieter, more energy-efficient choice for homeowners. It also provides more consistent indoor temperatures for enhanced comfort.

Signs of a Blower Motor Gone Bad

If your home doesn’t feel as cozy as it usually does, your blower motor might be the culprit. Watch out for these warning signs of a bad blower motor:

  • Weak or no airflow from vents: Insufficient airflow makes your home heat or cool more slowly, creating discomfort and inefficiency. A complete absence of airflow might suggest total motor failure, which calls for immediate evaluation from an seasoned HVAC professional like the team at Service Experts Heating, Air Conditioning & Plumbing.
  • Odd noises: Unusual sounds like grinding or squealing may be warning signs of worn-out bearings or a misaligned motor. These noises are not only annoying but can indicate impending breakdown.
  • Concerning aromas: A burning smell could indicate an overheating motor, a major issue requiring prompt intervention to prevent the problem from intensifying.
  • Increased energy bills: A blower motor that works harder than necessary because of an underlying issue consumes more energy. This inefficiency can cause a significant increase in your utility bills.
  • HVAC unit overheating: Overheating can occur when the motor struggles due to friction or a mechanical issue. This can lead to a complete system breakdown if not addressed quickly.

What Causes Blower Motor Failure?

A blower motor can break down for many reasons, including:

  • Moisture buildup: Water in the wrong areas can result in catastrophe for your blower motor. Moisture can corrode metal parts and cause electrical shorts that can significantly impact the motor’s operation.
  • Debris accumulation: Dust and dirt plugging up components of the motor can cause it to overheat or fail entirely.
  • Worn-out bearings: Bearings minimize friction in the motor. When they wear out, they overwork the motor, causing early failure.
  • Blower motor resistor or fan concerns: Problems with the resistor or fan can affect how the motor responds to demands for more or less air. These challenges can cause system inefficiencies and require skilled repair.
  • Temperature control problems: If the motor can’t effectively moderate the temperature, it may instead run continuously, which can cause wear and tear and eventually failure.
  • Electrical challenges: Bad wiring or other electrical issues can lead to irregular motor operation or a full-blown breakdown.
  • Old age: Like any mechanical equipment, blower motors have a fixed life span. As they get up there in years, materials within them wear out and failure becomes more likely.

Get Help Troubleshooting Blower Motor Problems from Service Experts Heating, Air Conditioning & Plumbing

At Service Experts Heating, Air Conditioning & Plumbing, nothing is more important to our staff than your comfort. We offer years of experience, emergency repairs and a 100% satisfaction guarantee. If your blower motor is giving you problems, or you want to prevent future problems before they start, reach out to Service Experts Heating, Air Conditioning & Plumbing. We’ll diagnose and fix the problem so you can enjoy a comfortable home environment again. Schedule your appointment today by calling 866-397-3787!

Savings For You

See All Offers Here >
Offer

$50 OFF ANY REPAIR

  • Save $50 on a Paid Service
  • Written 100% Satisfaction Guarantee
  • Plus, ask how to save an additional 15% and waive your trip charge!
print
Offer

MAKE NO PAYMENTS FOR 30 DAYS!

  • Upgrade to Worry-Free Comfort with the Advantage Program and make NO payments for 30 days!
print

© 2024 Service Experts, Service Experts Heating & Air Conditioning, and the Service Experts logo and design are registered trademarks of Service Experts LLC and used under license by SE Canada Inc. All Rights Reserved. *Not applicable to the Advantage Program. See your signed Advantage Program Agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions.

Chat with a Service Experts Professional