Noise A Bad Blower Motor May Make

In this video I have a great example of what it may sound like if your blower motor is damaged internally. The blower motor that's making the noise in this video likely has a bad bearing. Notice the noise comes and goes depending upon weather the blower motor is turned on or off. The pitch of the noise changes noticeably with the speed of the blower motor.

Please note: This is only and example of what it may sound like when a blower is damaged internally. Its been my experience that blower motors may make different noises when failing and in some instances they may not make noise at all. I make no guarantee that if you hear a similar noise under the same conditions on your vehicle that the blower motor is definitely faulty. You may need a technician to confirm that your blower motor is faulty. This is only an example of what it MAY sound like if your blower motor is damaged internally.