I have a Maxima 93 GXE, AT. It's heater blower only works in high. It does not work in Low, low-medium, and medium. When I set it to high, it make a click noise and works. I took off the glove compartment and check the blower and of course it works only in HIGH. Do I need to change the main control box? Thank for your attention to this.

 

Your problem is... the blower motor resistor assembly. This resistor is attached to a metal heat sink that is attached to the blower housing. To locate the blower resistor, remove the complete glove compartment. This will provide access to the blower housing and the blower resistor assembly will be clearly visible. Remove the connector from the wiring harness and the two screws holding the resistor assembly to the housing.

Good luck and enjoy all your speeds again!