You will want to go to off. Some other models may ask if you want to unlock your thermostat. Press the center button and hold to unlock the keypad. This will allow you to enter the key code to turn off your lock. Enter your keypad code. With most Honeywell models, the default keypad code is "1234." You can punch this in by scrolling through.. This is a simple instruction on how to unlock a Honeywell Home ProSeries thermostat. Let me know if this is helpful, and what other things you'd like to see.
You're not alone—many people are puzzled by the locking function on this important tool in their home. Fortunately, unlocking the thermostat is easy, and can be done in just a couple of steps. Keep reading to learn how to unlock your Honeywell thermostat and adjust the lock settings in under a minute.. Unlock Honeywell T4 Pro Series Thermostats. Locked your Honeywell T4 Pro series thermostat and now want to unlock it? Here's how you can unlock the very same thermostats. Follow these steps. Press the Center button on your thermostat and enter the password. The default password is 1 2 3 4.