Customer said they could not adjust the thermostat setting. Found the thermostat to be in keypad lockout. I had to type in a code to remove this. The code that worked was 1234. To do this press the button in the middle, use the plus or minus button to bring the number in the middle to 1, press select. Then bring the number to 2 and press select. Do this for 3 and 4 until the 4 digit number above the thermostat displays 1234, press select one more time and it should unlock it. Removed the lock mode for the thermostat and turned off the ability to lock. The instructions above are in case the thermostat locks out again. Thank you for your business.