If you have a Honeywell Thermostat, then there is a chance to enabled security lock settings. Once enabled, you or any other user must enter a four-digit password in order to make changes.The security settings on your Honeywell thermostat can be used to prevent unauthorized changes to system settings.
Enable lock security
1: Press the "Menu" button on your Honeywell thermostat and press over until you reach "Screen Lock" then hit select
2: Select the lock option to use
- Select "Unlocked" if you want to allow unrestricted access to thermostat settings.
- Select "Partial Locked" if you want to allow other users to change only the temperature.
- Select "Fully locked" if you want to restrict access to thermostat settings completely.