Fan Speed Button

The fan speed rocker switch changes the fan speed by pressing the increase/decrease end of the rocker switch once in order to change the fan speed by 1 level.

Holding the switch increases/decreases the fan speed until you release the switch or the fan reaches maximum speed.
^ You release the switch
^ The fan reaches the maximum/minimum speed.

If the system is operating under AUTO tan speed control, pressing either end of the fan speed rocker switch stops the AUTO fan speed control and begins a manual fan speed control.
^ Stops the AUTO fan speed control
^ Begins a manual fan speed control

The fan speed remains constant, unless the driver presses the rocker switch again.

When the system is in OFF mode, pressing either end of the fan speed rocker switch causes the system to turn on in AUTO mode with AUTO fan speed control.