Fan Speed Increase/Decrease

The Oldsmobile fan speed control knob is a rotary switch without mechanical stops. In the manual fan speed mode, there are 9 speed settings. Select the setting by rotating the knob in one of the following directions:
^ Clockwise
^ Counterclockwise

The corresponding Light Emitting Diode (LED) illuminates in relationship to the blower speed. By pressing the fan speed control knob, the fan will operate in the AUTO mode. In the AUTO mode, the programmer selects the appropriate blower speed. If the system is operating under the AUTO fan speed control, the fan speed knob causes the following actions to occur:
^ The AUTO fan speed control stops.
^ The manual fan speed control begins. The fan speed remains constant, unless the increase/decrease switch is rotated again.