How Long Do HVAC Blower Motors Last?

The blower motor is one of the most important components in any HVAC system. When the blower motor malfunctions, you’ll feel it fairly quickly. Thus, savvy HVAC technicians always make sure this component receives attention during maintenance sessions. But even with regular maintenance, the blower motor in furnaces and boilers can still break down.

So, how long do HVAC blower motors last? As the premier choice for HVAC services in Boiling Springs, SC, this ranks as one of the more common questions we hear from our customers. We’ll cover all the details in this post.

The Lifespan of HVAC Blower Motors

One of the hardier components in any HVAC system includes the blower motor. Therefore, you can expect yours to last as long as the HVAC system. Most blower motors effortlessly last 15-20 years, all things being equal.

Factors That Influence a Blower Motor’s Longevity

Some of the factors that influence the longevity of a blower motor include the following:

The Immediate Environment

Blower motors always have contact with the air outside. Therefore, changes in the volume of corrosive elements and contaminants in the air can hasten their deterioration. Even prolonged exposure to high humidity levels can slowly weaken the blower motor.

Poor Maintenance Culture

Regular maintenance provides the surest way to get ahead of potential HVAC problems. A weak compressor or a problem in the electric circuit can cause the blower motor to overheat and break down earlier than expected.

Short Cycling

The blower motor tends to be one of the hardest hit if the HVAC system runs an unnaturally short cycle. How long do HVAC motors last in such conditions? It depends on other factors, but our technicians can help.

Signs You Should Replace Your HVAC Blower Motor

The average blower motor has a long lifespan, but it’s still a mechanical component. You will likely face the probability that it will break down long before the advertised lifespan. In that scenario, you’ll need to replace the component to keep enjoying the comforts of a functional HVAC system.

Some of the common signs you should replace your blower motor include:

Weak Airflow

This provides one of the first signs of a faulty blower motor. If you notice a significant drop in the airflow, it indicates the blower motor struggles to push chilled air through the ducts. Blower motors deliver weak airflow due to dirt and dust buildup in the motor or a bad capacitor. In some cases, the motor is at the end of its lifespan.

Keep in mind that clogged filters and dirty or leaky ducts can also contribute to the drop in airflow. So experienced HVAC technicians look toward both directions first before turning their attention to the blower motor.

No Airflow

If you notice no conditioned air coming through your ducts, even with the HVAC equipment functional, you may have a broken blower motor. However, like other HVAC problems, you’ll need to rule out other potential causes, like a fan control problem, a faulty thermostat, or a bad relay, before considering the blower motor.

A Sudden Rise in Energy Bills

The blower motor burns the most energy in HVAC systems. A blower motor on its last legs will need to work harder to deliver conditioned air throughout your property. This often results in a sudden spike in your bills.

Persistent Overheating

Do you perceive a burning smell every time your HVAC system runs for a short while? An overheating blower motor is usually the problem. Most furnace or air conditioning systems will shut down automatically when they overheat. You’ll want to avoid interpreting this as a normal cooling or heating cycle to save money on costly repairs.

Noisy Operation

Does your HVAC system make screeching or squealing sounds during operation? This sign indicates a possible problem with the blower motor. Such sounds often point to a blower motor that has bearing problems or a damaged belt. Lubricating the blower wheel and bearings or replacing the belt will fix the problem in that scenario.

Rattling, clanking, or banging sounds often point to a loose or broken part within the motor.

Get Professional Guidance Today

The answer to “How long do HVAC blower motors last?” is generally “as long as the HVAC system” until a problem arises. Do you suspect problems with your HVAC motor? Don’t rush into buying a new HVAC system. Contact a qualified HVAC technician for a comprehensive diagnosis.

Call the Smooth Sailing Heating & Cooling team in Boiling Springs, SC, today at (864) 531-7732 to schedule a consultation.