Carrier ComfortChoice Touch User Manual page 90

KEYPAD LOCKOUT FEATURE
If the entire keypad is locked and the user presses a button, a backlight turns on
to maximum brightness for 10 seconds but none of the thermostat settings can be
changed. The invalid buzzer signal will beep.
If the temperature settings are enabled in the keypad lockout, the setpoints can be
changed by the physical buttons or the HEAT TO and COOL TO touch screen
buttons.
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