How do I know if my furnace blower motor is bad?
Rachel Hickman
Published Mar 08, 2026
How do I know if my furnace blower motor is bad?
What Are Signs Your Blower Motor Needs to Be Replaced?
- Poor or Airflow from Air Vents. This will be the first and most obvious sign your blower motor has a problem.
- No Airflow At All From Vents.
- Skyrocketing Energy Bills.
- Strange Noises When You Turn on the Heat.
- Overheating Blower / Weird Smells.
How much should it cost to replace a furnace blower motor?
An HVAC blower motor replacement costs an average of $450 but anywhere from $150 to $2,000 to replace. It doesn’t matter if you have a gas furnace, electric or heat pump, they all use an air handler blower motor to push the air throughout your home’s ducts.
How long do furnace blower motors last?
10-20-year
Even though the manufacturer states their blower motor will last two decades, we advise all clients to expect a 10-20-year life span due to age, use, and proactive maintenance.
Is it hard to replace a blower motor?
If you don’t want to sweat or shiver, then find a good mechanic. The replacement of the blower motor is common and straightforward, so most shops will perform the repair — many on the same day.
What does a bad blower motor sound like?
A defective blower motor will make a continuous sound noticeable by the passengers in the vehicle. It can manifest as a knocking, whirring, clunking, vibrating, squealing, or whining noise that persists until the blower motor is replaced.
Can a blower motor be repaired?
There are a number of things that can go wrong with your heating system, but if the air stops blowing altogether and the same is true on cold air settings, a blower motor replacement is likely in order. The good news is that it’s a fairly straight forward repair.
Why is my blower motor so loud?
The blower motor needs routine lubrication, and often a specific kind of lubrication to upkeep performance and function over time. Otherwise, the fan might seize up and cause a loud noise (and an even louder repair bill). If you are knowledgeable of the process, you can add lubrication to the motor.
Can a furnace blower motor get weak?
Similar to other components in an HVAC system, the blower motor will become more vulnerable to mechanical failures as it experiences more wear and tear over time. If your air conditioner is aging and becoming increasingly problematic, there’s a good chance the motor is in trouble.