How to Unlock the Honeywell T3750 Thermostat

1. Pull the flap on the front of the stat down exposing all of the settings buttons.

2. Press "run schedule" and "copy" at the same time.

3. Scroll through the options with the "i" button just below the display.

4. Stop on "KYLCK 2" or key lock.

5. Using the down arrow below the display change the value of kylck from "2" to "0" and press "run schedule".

7. Using the arrows again change save configuration to "yes".

8. Press "run schedule", and stat is unlocked.

Now to change your permanent occupied setpoint values (or target temperatures).

Press "Occupied Heat", and adjust the value up or down with the arrows.

Press "Occupied Cool", and adjust the value up or down with the arrows.