Describing three most common blower motor problems and how to fix them. DIY friendly.
Be sure to also check the "5 Reasons Why Your Car Heater Is Not Working" video (   • TOP 5 REASONS why your car heater is ...  ) that covers - general air distribution operation principles and common problems with HVAC system.

Timestamps
00:00 - Intro
00:14 - 3 Most Common Blower Motor Problems
00:43 - 1st Scenario: Blower Motor Doesn't Work At All
01:08 - How to check Fuses and Relays
02:07 - Blower Motor Diagnosis
02:49 - Blower Motor Replacement
03:29 - 2nd Scenario: Blower Motor Only Works at Max Speed
03:51 - Blower Motor Operation Principles
05:18 - Blower Motor Resistor Replacement
06:45 - 3rd Scenario - Blower Motor Doesn't Work at High Speed
08:07 - Extra Tips
09:30 - Blower Resistor VS Blower Transistor
10:22 - Conclusion

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Disclaimer:
Due to factors beyond the control of Make It Easy Mechanic, it cannot guarantee against improper use or unauthorized modifications of this information. Make It Easy Mechanic assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Make It Easy Mechanic recommends safe practices when working on vehicles and/or with tools seen or implied in this video. Due to factors beyond the control of Make It Easy Mechanic, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Make It Easy Mechanic.