How do I lock and unlock my thermostat?

To prevent tampering with your settings, the front panel keys and the rotary dial can be locked out, requiring a four digit code to unlock them. You may use either the default lock code of “000”, or your own code number. The button presses below must be performed in a timely manner.  If not, it will go back to Run mode and you will have to start over.


If you forget the code and need to unlock it:

  1. Take the front half of the thermostat off the wall.
  2. On the back of the thermostat, identify the small white button on the circuit board labeled “H.W. Reset”.  This stands for Hardware Reset.  Press this button down for 3 seconds.
  3. Padlock on screen should now be in “open” position.
  4. This will unlock the thermostat and reset the code to 000.  You will have to reset the day, time, and reprogram all your settings.

To program the lock code to a custom setting:

  1. press the MENU button
  2. press the SCROLL button 6 times
  3. press the YES button 2 times
  4. then enter your number using the up and down buttons
  5. then touch YES and then EXIT.

To Lock the keypad, just hit the icon of the padlock on the display screen. “Lock key” will appear.  Hit “Yes”.
To Unlock the thermostat, hit the icon of the padlock on the display screen.  “Unlock Key” will appear.  Hit Yes and put in your 4 digit code.  Hit Yes.