blower motor will not shut off

Hello, this could be due to an issue with an automatic temperature climate control unit if equipped, or possibly a blower motor resistor issue. This could also be related to a wiring concern. These are only ideas, and only testing will determine the cause of failure. Good luck.

It would appear that power is applied to the motor at all times, even with the key off. Since most blower motor speed controls are operated by resistance or pulse width modulation, the control issue would need to be verified by a professional.