How long do HVAC fan motors last?

Author: Savanah Paucek  |  Last update: Monday, May 19, 2025

Typically, the lifespan of furnace blower motors spans from a minimum of 10 years up to about 20 years, with most enduring an average period between 15 and 20 years. The same blower motor is used for both heating in the winter and cooling in the summer, making it essential for maintaining indoor climate control.

How often should you replace an AC fan motor?

The lifespan of a home AC compressor fan motor typically ranges from 10 to 20 years. However, several factors can influence this lifespan, including: Usage: Frequent use can lead to quicker wear and tear. Maintenance: Regular maintenance, such as cleaning and lubrication, can extend the motor's life.

How long should an HVAC blower motor last?

How Long Does a Furnace Blower Motor Last? Blower motors are designed to last just as long as your furnace itself, anywhere from 10 to 20 years. Just as with any HVAC system, the better maintained and serviced your equipment is by experienced HVAC technicians the longer it will last and the fewer repairs you'll face.

What is the life expectancy of an AC fan motor?

Most AC condenser fans will last 10 to 15 years if properly maintained. A lack of routine maintenance gives you only four years of successful fan service. Here at Quality Cooling & Heating, we get a lot of concerned calls from customers dealing with various air conditioning problems.

How do I know if my HVAC fan motor is bad?

7 Signs and Symptoms of a Bad AC Fan Motor
  1. AC Fan Doesn't Start. Even though you have the AC turned on, the fan does not start.
  2. AC Fan Doesn't Stop. ...
  3. Slow Rotating Blades. ...
  4. Outside Fan Blades Are Still. ...
  5. Rattling, Humming, and Buzzing Noises. ...
  6. AC Runs Intermittently. ...
  7. No Cold Airflow.

ECM Fan Motor Won't Turn On or Won't Shut Off on HVAC Unit! Testing the Board and Fan Motor!

How much does it cost to replace a fan motor in a HVAC system?

What's the Cost of Repairing or Replacing a Fan Motor? The average cost of a condenser fan motor is between $300 and $500 (not including installation). If the compressor breaks, you are looking at a much costlier problem which could cost up to $2000. In some cases, your fan motor may be under warranty.

What can cause a fan motor to go bad?

Overheating. Overheating is one of the most frequent occurrences that can render the blower motor inoperative. If the motor has overheated, it may shut itself down to prevent damage. You should keep your HVAC clean and clear of any blockages or debris to avoid overheating and maintain efficiency.

Is it worth replacing fan motor on AC?

The Cost of Not Replacing It

Because of how hot the system runs, running your AC with a failed fan motor could result in your compressor failing, too. The compressor is a much more expensive component, typically running $1,400-$3,000, so procrastinating on AC repair could be a very costly delay.

Is it OK to run HVAC fan continuously?

Although it is perfectly safe to run HVAC continuously, there are a few times you should shut it down. First, if your home is experiencing high summer temperatures and you have ductwork in the attic. It is difficult for even the best-insulated systems to fight off extreme temperatures.

What happens when a condenser fan motor fails?

The Dangers of a Malfunctioning Condenser Fan Motor

If the condenser fan is not working properly, it can cause the temperature of the refrigerant to rise, leading to high-head pressure events. This can cause the compressor to overheat and potentially fail, resulting in costly repairs.

Why do HVAC blower motors fail?

One of the most frequent causes of a malfunctioning blower motor is electrical issues. These can include blown fuses, tripped circuit breakers, or faulty wiring. Check your home's electrical panel for any tripped breakers or blown fuses and reset or replace them as needed.

When should I replace my HVAC blower motor?

Here are the signs you need to give your residential heating repair company a call about this problem.
  1. No Airflow. If you notice that there is no warm air at all coming through your heat registers, then you may have a broken blower motor. ...
  2. Less Airflow. ...
  3. Rattling or Screeching Noises. ...
  4. High Energy Bills. ...
  5. Strange Smells.

How long is HVAC supposed to last?

In general, most HVAC systems will last 15 to 25 years, but depending on the type of system and other contributing factors, that estimate can be highly variable. Even with HVAC maintenance and regular repairs, eventually, even the best boilers, furnaces, heat pumps, and air conditioners today will run their course.

How do you know if your AC blower motor is going out?

If the motor is making rattling, clanking, or banging sounds, it may be because of a loose or broken part inside the system. Loud banging sounds are especially worrisome. They're usually a sign that something within the system is damaged or disconnected, potentially indicating the need to replace the blower motor.

How long do HVAC blower motors last?

Typically, the lifespan of furnace blower motors spans from a minimum of 10 years up to about 20 years, with most enduring an average period between 15 and 20 years.

How often should you clean your AC fan?

A: Ideally, you should clean your blower motor at least once a year. However, if you notice any of the signs mentioned above, it's best to schedule a cleaning.

Is it better to leave HVAC fan on or auto?

Since the AUTO setting means the fan is only engaged when the system is on, rather than constantly blowing, AUTO is the most energy-efficient option between the two settings.

Is it okay to leave the AC on 24/7?

Consequences of Running Your Air Conditioner 24 Hours a Day

Wasted energy: Running the AC to cool your home beyond your comfort level wastes energy and contributes to an increased carbon footprint. This is bad news for the environment and your energy bills.

Does a HVAC fan use a lot of electricity?

The average unit has a 500 watt fan, which uses almost as much energy over the course of the year as a refrigerator, resulting in a $50/month bill. During the summer months, the ducts in your attic and close to your walls can fill with warm air, resulting in the fan blowing hot air into your house.

What is the average price to replace an AC fan motor?

AC condenser fan motor replacement costs $200 to $700 on average if not under warranty or $100 to $300 for labor under warranty. Central air conditioner fan motor prices are $100 to $400 for the part alone, depending on the brand, model, and voltage. AC repair services charge $75 to $150 per hour for labor.

How do I know if my AC unit fan motor is bad?

The common signs that your fan motor is faulty include:
  1. The fan doesn't start even with the AC on.
  2. The fan doesn't stop even with the AC off.
  3. The fan turns on, but the blades are rotating slowly.
  4. A rattling noise comes from the condenser unit when you turn the fan on.

How do I know if my HVAC blower motor is bad?

Here are the key indicators:
  1. Unusual Noises. Screeching or Squealing. ...
  2. Weak Airflow. Insufficient Heating. ...
  3. Motor Overheating. Excessive Heat from the Furnace. ...
  4. Inconsistent Performance. Start-Stop Issues. ...
  5. High Energy Bills. An inefficient, struggling blower motor often increases energy usage and higher bills.
  6. Age and Wear.

What is the leading cause of AC motor failure?

Winding insulation breakdown and bearing wear are the two most common causes of motor failure, but those conditions arise for many different reasons. This article demonstrates how to detect the 13 most common causes of winding insulation and bearing failure in advance.

Can AC work without a fan?

Your AC is rendered useless without a functioning fan or furnace blower motor. This could also mean that you need a furnace repair or should start looking at costs for blower motor replacement. In addition, you will either suffer from no air or weak airflow with fan problems.

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