How To Unlock the Honeywell Thermostat?

unlock the honeywell thermostat

There are many reasons to lock and unlock the Honeywell thermostat, the best product of Honeywell manufacturers. Especially in households with energetic children, this device can lock and unlock settings to prevent interference and sudden temperature changes. Here we need to know how to unlock the Honeywell thermostat if we close it, as a locked thermostat is useless. 

The temperature-sensing equipment regulates the warmth of your home in a pinch by unlocking it. The Honeywell range of thermostats has several models that have these locking and unlocking features, but the process of unlocking a thermostat depends on its installed model. There are only a few models that offer lock features. 

5 Easy Steps How to Unlock the Honeywell Thermostat.

  • Honeywell T6 pro series 
  • Honeywell T6 pro smart series
  • Honeywell 8000 series
  • Honeywell T4 pro series
  • Honeywell TH4110D

Before getting start, we will explain the thermostat lock modes. The main reason to lock a thermostat is to allow you to control who can change your device settings. There are three following options when you access the menu of your device.

  1. Full (on): It prevents access to its settings, which means that nothing can be changed until the correct PIN is entered.
  2. Partial (part): It gives you partial access to the unit, allowing you to change the temperature.
  3. Off (off): Marked as “OFF” means that the keypad is unlocked all the time.

If you have a Honeywell thermostat with locking and unlocking capacities, it’s important to consider the steps for unlocking and locking a thermostat. Here we will discuss the different unlock methods of different Honeywell thermostat models.

Honeywell T6 Pro Series

Unlock the Honeywell thermostat T6 pro series z-wave is simple. 

  1. Remove the faceplate and locate the four-digit number on the top right of the thermostat.
  2. Enter 1,2,3,4 to this four-digit code that will be your thermostat pin.
  3. Press the unlock button, then press the +/- buttons on display to change the selected number.
  4. Now tap select to set this number and repeat it until four digits have been entered in the right order. 
  5. Once you enter the PIN correctly, your device will be unlocked.

Honeywell T6 Pro Smart Series 

This thermostat offers smart capabilities, an LED display, and easy tools. It will unlock by following the steps.

  1. Locate the lock button on the menu display and press it. You will be prompted to enter the PIN code.
  2. Now press the +/- symbols to change the individual digits.
  3. Press the select button to enter the digits of your PIN and confirm it.
  4. Repeat 2 and 3 until you finish through the required digits.

Honeywell 8000 Series 

Honeywell thermostats 8000 series also come with smart capabilities and complexities. It takes more steps to be unlock than other series.

  1. Locate the system button from the menu display and hold it for a few seconds.
  2. Find the blank button on the lower center of the thermostat, and hold it until the display changes.
  3. By using the up and down keys, change the digit value on the left of your pin.
  4. Now change the digit on the right side to “0” by using the up and down keys again and pressing done, your device will be unlocked.

Honeywell T4 Pro Series

To unlock the Honeywell thermostat T4 series, you should use the same method as T6 Pro.

  1. Press the unlock button from the display menu and type “1,2,3,4” in the default password.
  2. Tap the +/- keys on display to change between the selected numbers.
  3. Tap select to confirm the number of your choice.
  4. Repeat steps 2 and three until your digits are correctly entered, and your thermostat will be unlocked.


Honeywell thermostat allows you to manipulate the desired temperature range and customize the thermostat experience and prevent others from touching them. The locking and unlock system can also save you time and secure your money on energy bills. 

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