In this blog, we will be learning about how to unlock a Honeywell thermostat.
For unlocking a Honeywell thermostat, you have to enter the code after stimulating unlock.
What are the several lock modes in the Honeywell thermostat?
The main reason behind us locking our Honeywell thermostat is to authorize us to command who can modify our device’s settings. Also, we get the choice of either partially or fully locking the keypad of our devices. To get to see this option you have to go to the ‘menu’ section of your device.
The Honeywell thermostat features three types of locks in the settings. The specifications in the bracket demonstrate in which way they are in the device:
- Full (On): This setting of a ‘full’ lock prevents total access to the thermostat settings.
- Partial (Part): In this setting, you will only be allowed to change the temperature of the thermostat only, and all the other settings will not be accessible.
- Off (Off): In this, the whole setting of the thermostat will be completely unlocked.
To remove ‘on’ and ‘part’ settings you will need a code.
You should keep the settings on ‘full’ if you normally leave the device on a schedule to work. Keep it on ‘Part’ if you are likely to deviate from your schedule. In this way, you will be saving a lot of time. Also, make sure that you never forget your code. When you enter the code it will unlock the lock mode and switch it to ‘Off’ settings.
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How to unlock Honeywell thermostat pro series?
Unlocking and locking the Honeywell thermostat proseries is not such a big deal, having a little knowledge of keys and terms makes it a lot easier. Unlocking and locking procedures of Honeywell proseries T4 and T6 are the same.

For unlocking the Honeywell proseries you have to follow the sequence of steps given below:
- Click on the button in the middle of the Honeywell pro series thermostat.
- Next you have to input your code by clicking on the “+” or “-” button to modify the digit to enter the code.
- Click on the select button after entering the code.
- Your thermostat is unlocked.
How to unlock the old Honeywell thermostat Series?

To unlock the old Honeywell thermostat follow the instructions given step by step:
- Click on the ‘system’ and ‘auto’ both options down simultaneously on the screen.
- In the bottom center of the keyboard, there is a blank key click and hold it until the display changes.
- Modify the digits on the left side to ‘0670’, by the use of the up and down keys in the center of the screen.
- On the right-hand side modify the digit to 0 with the help of the up/down keys.
- Now, click on ‘done’ to complete the unlock.
How to unlock the T6 pro series of Honeywell thermostats?
For unlocking the keypad of the T6 pro smart thermostat you must follow these instructions given step by step:
- Click on the lock option on the display and then type the code.
- Then click on the keys +/- for modifying the individual digits on the screen.
- Next, to confirm the digits click on ‘select’.
- Until you fill all four digits in correct order keep repeating steps 2 and 3.
- After doing this the device will get unlocked and you can access all the settings now.
How to unlock the Honeywell thermostat 8000 series?
To unlock the old Honeywell thermostat follow the instructions given step by step:
- Click on the ‘system’ and ‘auto’ both options down simultaneously on the screen.
- In the bottom center of the keyboard, there is a blank key click and hold it until the display changes.
- Modify the digits on the left side to ‘0670’, by the use of the up and down keys in the center of the screen.
- On the right-hand side modify the digit to 0 with the help of the up/down keys.
- Now, click on ‘done’ to complete the unlock.
FAQs
What is the default code for the Honeywell thermostat?
The default code for the Honeywell thermostat is 1234.
How do you bypass a locked Honeywell thermostat?
In the bottom center of the keyboard, there is a blank key click and hold it until the display changes. Modify the digits on the left side to ‘0670’, by the use of the up and down keys in the center of the screen. On the right-hand side modify the digit to 0 with the help of the up/down keys. Now, click on ‘done’ to complete the unlock.
How do you unlock a locked thermostat?
Click the up/down buttons to modify each digit by the use of the next button to cycle by which digit is flashing. Click and hold the next button for at least 5 seconds. It will return to the normal run screen.