Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
Control Module HVAC: Description and Operation
Blower Speed Override Thumbwheel
Rotating the blower speed override thumbwheel more than 10 degrees will turn on the automatic blower indicator and provide manual control of the
blower motor speed. Rotating the wheel fully down against its lower stop locks the blower at its lowest speed. Rotating the wheel fully up against the
stop locks the blower at its highest speed.