Many Honeywell WiFi thermostats have a lock screen mode. This keeps anyone from messing with t-stat settings without first putting in a password. You set this pass code when locking your t-stat. Then, to unlock it, the t-stat asks you to enter this secret code. Once you do that, you again have full control over settings such as WiFi, temperature, scheduling, and other HVAC details. So here we explain How to Unlock Honeywell WiFi Thermostat. Explicitly, we show this on the RTH9580WF programmable WiFi thermostat.
This demo begins with our t-stat locked. We also assume that the t-stat is showing its Home page.
Find the MENU button in top right corner of that page. Note that even when the t-stat is in lock mode, the MENU button still works.
This then displays the main menu page. Keep in mind that you might have to press the down-arrow button several times to reach the Security Settings option.
The next picture shows the main menu, already scrolled, to show the Security Settings item.
A password protected Honeywell WiFi thermostat then shows the Please enter your password prompt screen.
Then enter the code you assigned when you set up the password. In this scenario, our security code was 2752. So, we used the up and down arrows above and below each number position. With these, we can enter the correct digit for each position.
Again, unlocking allows access to the Security Settings menu. There you can either fully unlock, partially lock, or remove the password altogether.
So tap Done once you punch in the pass code. The thermostat then shows the Security Settings screen.
From here, you could choose either of the following.
You need not remove the password to unlock the thermostat. Nor must you change the lock mode in order to remove the password.
Then this again displays the Change Lock Mode screen, that shows the Fully Locked option highlighted in blue.
This unlocks the thermostat and returns you to the Security Settings screen.
Then this returns you to the main menu as shown next. Note that all menu items are now available. Verify this by scrolling down through them. If you see the following items such as…
So if you do see these, then you have successfully unlocked your thermostat.
Finally, you are now free to change any setting you wish on the main menu. Thermostat unlocking is now complete.
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