Carrier ComfortChoice Edge Owner's Manual page 31

Keypad Lockout
5. Press the done button.
6. Close the thermostat door.
You will see a padlock icon on the screen.
To temporarily unlock the keypad:
1. Open the thermostat door.
2. Press and hold the up and down buttons simultaneously for about five
seconds.
The padlock icon will disappear. This means the keypad is unlocked and can
be used. The keypad will revert back to the locked state after you've
stopped pushing buttons for two minutes.
3. Close the door.
Note: To permanently unlock the keypad, follow Steps 2 through 5 of the
Keypad Lockout procedure above, but in Step 4, press the down arrow
button until the screen displays 0F.
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