See also:

Clearing the programmed information
Individual buttons cannot be cleared, however to clear all programming, push and hold the two outside buttons and release when the indicator light begins to flash (in approximately 20 seconds) ...

Troubleshooting guide
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Dehumidified defogging
This mode is used to defog the windows and dehumidify the air. 1. Turn the air flow control dial to the position. 2. Turn the fan control dial to the desired position. 3. Push the button. The ...