- 1). Press your Honeywell thermostat's "System" key. Five blank touch keys will appear on the bottom of the screen between the "Cancel" key and the "Done" key.
- 2). Touch the blank center key and hold it down for approximately 5 seconds until the screen changes to the "Advanced Settings" menu.
- 3). Press the middle arrow keys up or down to change the "User Setup Number" located in the bottom left corner. You want user setup number 0670 to unlock your thermostat.
- 4). Use the arrow keys on the right side of the screen to change your "Options." Press up or down to select the number "0." This unlocks all of the keys on the screen.
- 5). Lock your screen again by repeating the above steps. However, under "Options," choose "1" to partially lock the screen or "2" to fully lock the screen.
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