Good morning,
The blower resistor is the most common reason for this.
I attached the location and procedure for you to view of the repair.
I also attached a wiring diagram of the system for you to view. Verify power to the resistor.
https://www.2carpros.com/articles/how-to-check-wiring
Roy
REMOVAL PROCEDURE
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1. Disconnect the electrical connection at the blower motor.
2. Disconnect the electrical connection from the blower motor resistor.
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3. Remove the blower motor resistor retaining screws.
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4. Remove the blower motor resistor.
Images (Click to make bigger)
Friday, April 30th, 2021 AT 2:23 PM
(Merged)