Some smart models of the Honeywell thermostats like the RTH9580WF we describe here, have a locking mode. This keeps curious fingers from adjusting t-stat settings without first punching in a password. You create this secret code when locking your thermostat. Then, the t-stat asks you to enter this code to again open up access to settings such as temperature, scheduling, Wi-Fi, and general adjustments. So here we give locking Honeywell thermostat instructions, with a demo on Honeywell’s RTH9580WF WiFi t-stat. It’s easy to keep your t-stat secure with features like this.
Locking Honeywell Thermostat Instructions
1. Tap the MENU Option
Find the MENU button in top right corner of the screen, which then displays the main menu screen. Once there, you may have to press the down-arrow button a few times to locate the Security Settings item. The next picture shows the main menu, displaying this option.
2. Tap the Security Settings Option
The Security Settings screen then displays, as shown next.
3. Tap the Change Lock Mode Button
This brings up the Change Lock Mode screen, as we see next. Note that the Unlocked option is highlighted on that screen in a brighter blue. This means that the thermostat is currently unlocked and that users can access all settings and schedules without unlocking it first. We’re now going to lock it.
4. Tap the Fully Locked Option to Continue with Locking Honeywell Thermostat
This again displays the Change Lock Mode screen, but now, shows that Fully Locked option highlighted in the bright blue. The thermostat will enter fully locked mode once you press the Done button in the next step.
Note that we could have tapped the Partially Locked button here instead, in which case that option would have been highlighted in the next screen shot. But in this demo, we’re only showing what happens with the Fully Locked mode.
However, you establish partial locking in the same way as we see below in the Fully Locked case, except that after locking, you’ll have access to some of the thermostat’s settings. These include namely, the current temperature setting on the Home screen. But with full locking, you’ll be able to access none of the settings, without first unlocking the thermostat.
5. Tap the Done Button
This takes you back to the Security Settings screen, as the next picture shows. Your thermostat is now in full lock mode.
Note that if you wish not to set up a passcode, you can skip ahead to step 9 below. The thermostat will still be locked, even though you’ve not set up a passcode. So you won’t need a password therefore, to unlock it. However, here we’re going to add one nonetheless, to demonstrate the comprehensiveness of the locking mechanism on Honeywell thermostats.
6. Tap the Create Password Button
The Your Password has been Created screen then displays, which shows a four-digit passcode that you’ll need to unlock the thermostat subsequently.
7. Write Down the Provided Password to Continue with Locking Honeywell Thermostat
Be careful not to misplace or forget this passcode. Record it somewhere and keep it safe. Without it, you’ll be unable to gain access to the thermostat controls. Nor will you be able to reset the thermostat to factory defaults without calling Honeywell for help.
8. Press the Done Button
Tapping Done returns you to the Security Settings screen, showing that the Create Password button has now changed to the Remove Password button.
9. Tap the Previous Menu Button
The Previous Menu option returns you to the main menu, as shown next.
10. Tap the Home Button to Continue with Locking Honeywell Thermostat
Find the Home link in the top left corner of the screen, as arrowed above. This returns you to the thermostat’s home screen, as shown next. The thermostat is now in fully locked mode.
11. Check that the Honeywell Thermostat Screen is Locked
Try tapping the up and down arrows that adjust the current temperature setting. These buttons are circled in pink in the previous picture, at screen right. When the thermostat is indeed locked fully, any attempt to change the temperature produces the Screen Locked screen, as displayed next. If you get this page, your RTH9580WF is locked, and cannot be adjusted at all without the passcode. See below for how to unlock this locked Honeywell smart thermostat.
12. Press the OK Button to Go Back to the Home Screen
You may view current thermostat status and settings while locked; you just can’t change anything.
13. Done with Locking Honeywell Thermostat Instructions !
What the Full Lock Mode Stops on Honeywell Series 9000 Thermostats
Fully locked Honeywell thermostats prevent any changes to settings at all, including the current temperature.
All locked modes (full and partial) disallow the following main menu items. When locked, these do not appear when you view the thermostat’s main menu.
- Create Schedule
- Color Themes
- Vacation Mode
- Temporary Schedule Changes
- Wi-Fi Setup
- System Setup
Either lock mode permits access to the following status menu items.
- View Schedule
- Equipment Status
- Clean Screen
- Security Settings
Partially locked mode disallows the same main menu functions as fully locked mode. However unlike fully locked mode, partially locked mode allows you to change the thermostat’s current temperature setting.
Related Posts to Locking Honeywell Thermostat
- How to Turn Off Temporary Hold on Honeywell Thermostat
- Honeywell Smart WiFi Thermostat Manual RTH9580WF
- How to Reset Honeywell Thermostat RTH9580WF to Factory Default
- How to Cancel Schedule on Honeywell Thermostat
- Changing WiFi Network on Honeywell Smart Thermostat RTH9580WF
References for these Locking Honeywell Thermostat Instructions
- 2019-03-02: First published.