How To Unlock a Honeywell Thermostat? Every Series (2023)

I was completely unprepared for the amount of enthusiasm that my sister’s two children brought with them when they visited last week.

After discovering that the temperature in the interior of the house was far lower than usual, I began to get into trouble.

In an instant, I went to my Honeywell thermostat and reset it to its original setting, telling the youngsters not to fool with it again.

I looked up how to lock the keypad on my Honeywell Thermostat so that no one else could make changes to the thermostat’s configuration.

It was only natural that I sought up how to unlock my thermostat so that I could adjust the settings myself whenever I desired. 

When prompted to unlock a Honeywell Thermostat, enter the previously set PIN.

It can accomplish that by pressing the “Unlock” button on the Honeywell T4 Pro Series Thermostat.

Press and hold the lock symbol on the screen of your T6 Pro Series.

On the 8000 series, hold down both the ‘System’ and ‘Auto’ options at the same time, and then hold down the blank bottom center button until the system comes up. 

How To Unlock A Honeywell Thermostat: Every Thermostat Series?

What are the different Lock Modes in Honeywell Thermostats?

For the most part, we lock our Honeywell thermostats to keep track of who can make adjustments to their settings.

We can choose between a ‘Full’ lock and a ‘Partial’ lock for the keypad of our gadgets. You’ll notice this choice when you go to the ‘Menu’ portion of your device. Honeywell thermostats have three different locking options. When you see names in brackets, it means that’s how the gadget displays them:

  1. Full (On): In order to block complete access to the thermostat settings, the ‘Full’ lock setting is activated. 
  2. Partial (Part): It is possible to alter the temperature with the ‘Partial’ lock option enabled. Everything else will be locked out.
  3. Off (Off): It’s possible to unlock the thermostat’s keypad using this lockset. 

Anyone can use a PIN to unlock the ‘On’ and ‘Part’ locking settings. If you frequently depart from your timetable, keep the lock option as ‘Part.’ Use ‘Full’ as your default lock setting if you regularly leave your smartphone unattended.

You’ll be able to save a lot of time this way. The only thing you need to remember is the lock code for your door.

When the lock code is entered, the lock mode is disabled, and the system is turned to ‘Off.’ Honeywell thermostats can be unlocked using the instructions provided here.

Reset Honeywell Thermostat

How to Unlock the T4 Pro Series Programmable Thermostat

It is possible to unlock the keypad of your T4 Pro Programmable Thermostat by following the instructions provided below:

  1. To unlock the device, press the central button labeled “Unlock.”
  2. You are now able to enter the default password, which is ‘1234.’
  3. To make changes to the specified number, use the +/- keys on display.
  4. To set the number, press the ‘Select’ button.
  5. Steps ii and iii should be repeated until you have entered all four digits in the correct order.
  6. As soon as you have completed this process, the device will be unlocked, allowing you to view the settings without restriction. 

How to Unlock the T6 Pro Series Smart Thermostat

The following steps will guide you through the process of locking the keypad on your T6 Pro Smart Thermostat: 

  1. On the device’s screen, select ‘Menu’ from the drop-down menu.
  2. You may access the ‘Screen Lock’ setting by tapping the arrow buttons.
  3. Select by pressing the ‘Select’ button.
  4. With the help of the arrow keys, select one of the two lock modes that are available.
  5. To confirm your selection, tap on the ‘Select’ button.
  6. Selecting ‘Yes’ will bring the settings to a close.
  7. As a result, your device will have been successfully locked, either completely or partially, depending on what you performed in the previous steps. 

How to Lock the Honeywell 8000 Series Thermostat

These are the instructions for locking the keypad on your 8000 series Thermostat: 

  1. You can access the system by pressing the ‘System’ button on your screen.
  2. To see what’s going on, hold down the blank lower-center button for a while.
  3. Use the up/down keys in the middle of the screen to change the digits on the left side to ‘0670’.
  4. Using the up and down keys, adjust the right-hand digits.
  5. Choose one or the other when selecting the ‘Part’ or ‘on’ locking.
  6. They will remove the device’s lock if you select 0.
  7. To confirm, press the ‘Done’ button in the bottom right.


There are three different locking options available on your Honeywell thermostat. The “Full” locking setting prevents you from entering the keypad. In contrast, the “Partial” locking setting allows you to adjust the temperature, and the “Off” setting allows the device to remain in the unlocked position at all times.

If you want to keep the temperature constant, you can set either a Temporary Hold or a Permanent Hold.

You’ll never have to worry about your thermostat being tampered with by uninvited youngsters or guests again. Your Honeywell Thermostat’s automatic scheduling feature is now ready for use, so go ahead and customize your thermostat settings to your heart’s content. Installing a Honeywell Thermostat without a C-wire is an option if you’re feeling daring.  

Best Seller List of Honeywell Thermostats:

SaleBestseller No. 1
Honeywell Home RTH2300B 5-2 Day Programmable Thermostat
  • 5-2 DAY PROGRAMMING: Separate programs for the weekdays and weekends with 4 program periods per day including wake, leave, arrive and sleep
  • PRECISE TEMPERATURE CONTROL: Precise temperature control of +/- 1 degree Fahrenheit. Temperature range limits allow you to set minimum cooling and maximum heating temperatures
  • DIGITAL DISPLAY: The display panel is backlit with an intuitive interface for one-touch access to setpoint temperature
  • EASY INSTALLATION: Easy to install yourself and works with many heating/cooling systems, plus heat pumps without auxiliary heat
  • REMINDERS: Built-in battery change and filter change reminders
SaleBestseller No. 2
Honeywell Home RTH221B1039 1-Week Programmable Thermostat
  • ONE WEEK PROGRAMMING: Set one identical program for the entire week with four program periods per day including wake, leave, arrive and sleep.
  • PRECISE TEMPERATURE CONTROL: Precise temperature control of +/- 1 degree Fahrenheit
  • DIGITAL DISPLAY: Easy-to-read digital display with an intuitive interface for one-touch access to setpoint temperature
  • EASY INSTALLATION: Easy to install yourself and basic operation keeps programming simple
  • REMINDERS: Built-in battery change reminders (2 AAA batteries are required for operation)
SaleBestseller No. 3
Honeywell TH4110U2005/U T4 Pro Program Mable Thermostat, White
  • Country Of Origin: United States
  • Model Number: TH4110U2005/U
  • Item Package Dimension: 6.49999999337" L x 5.099999994798" W x 2.299999997654" H
  • Item Package Weight: 13.8 oz
SaleBestseller No. 4
2,797 Reviews
Honeywell TH3110D1008 Pro Non-Programmable Digital Thermostat, 1 Pack, White
  • Pro 3000 1 heat/1 cool non-programmable digital thermostat white
  • Model - TH3110D1008
  • This is manufactured in United States
  • Non-programmable digital thermostat
  • Backlit digital display - both current and set temperatures are easy to read in various lighting conditions.Shows both current and set temperatures at the same time.Precise comfort control [ 1 F ( 0. 5 C)] - maintains consistent comfort to the highest level of accuracy.Basic operation - easy-to-use slide switches allow you to select the heat or cool mode, and operate the fan
SaleBestseller No. 5
Honeywell TH1100DV1000/U Pro 1000 Vertical Non-Programmable Thermostat
  • 4 11/16 in. High x 2 7/8 in. Wide x 1 1/8 in. Deep
  • Premier white color
  • Made in United States
  • Package Dimensions : 12.0 L x 6.0 H x 12.0 W (inches)
SaleBestseller No. 6
Honeywell Home CT87K1004 The Round Heat Only Manual Thermostat
  • Classic round styling; familiar design looks great in any environment
  • Decorative cover ring hides wall marks
  • Precise temperature control of +/-1° F
  • Easy to install and use
  • Mercury Free
SaleBestseller No. 7
Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
  • SAVE ENERGY AND GET REWARDED by checking with your energy provider about available energy savings rebates to save on your purchase (rebate finder link above). Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.
  • C-WIRE POWER ADAPTER REQUIRED: Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter.
  • SMART HOME INTEGRATION. The Wi-Fi 7-Day is compatible with voice assistant devices like Amazon Alexa, Google Assistant, Microsoft Cortana, and more.
  • THERMOSTAT THAT FITS YOUR LIFE. 7-day, 4 periods per day, flexible programming lets you sync your comfort with your schedule.
SaleBestseller No. 8
Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy...
  • COMFORT COMES IN YOUR COLOR. Personalize your Wi-Fi Smart Color Programmable Thermostat to fit your décor.
  • SAVE ENERGY AND GET REWARDED by checking with your energy provider about available rebates. Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.
  • YOUR SCHEDULE. YOUR WAY. Flexible programming options for your schedule or utility company’s peak rate pricing.
  • EASY OPERATION AND INTUITIVE. Bright, easy-to-read touchscreen makes for simple operation.
  • COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.
SaleBestseller No. 9
Honeywell Home RTH8560D 7 Day Programmable Touchscreen Thermostat White
  • Scheduling your heating/cooling cycles to fit your lifestyle is easy to do, with options to program day-to-day, over the weekend, or for an entire week..Includes : Package includes thermostat and receiver | Thermostat Type : Programmable
  • The crystal-clear display on the T5 Touchscreen Thermostat provides a seamless blend of function and style.
  • The screen is brightly backlit with a cool blue color and provides an easy-to-read indoor temperature, including indoor humidity readouts.
  • For added convenience, reminders to change air filters appear on the screen.
  • The advanced design of this thermostat provides maximum comfort by sensing whether your home needs heating or cooling with the Smart Response Learning technology.
Bestseller No. 10
1,310 Reviews
Honeywell Home CT87N1001 The Round Non-Programmable Manual Thermostat, Large, White
  • With its familiar circular design and simple twist action, The Round Non-Programmable Thermostat makes setting your ideal temperature quick and easy.
  • The Round thermostat provides accurate performance with the ease of use that you’ve grown accustomed to – simply turn the dial to the desired temperature and let the thermostat take over.
  • Mercury-free and features a decorative covering ring to conceal surrounding wall marks.
  • Precise temperature control of and/- 1degreeF.



How do you override a Honeywell thermostat?

While pressing and holding the “off” button, use the “display” key to turn off your computer.

When you’re done tapping the “display” button, hold down the “off” button to keep the screen on for visualization. Use the ‘ up ‘ key while pressing and holding the ‘display’ key. Then, simultaneously release the “display” and the “up” keys. Honeywell’s thermostat should be overridden by this method. 

Is there a reset button on a Honeywell thermostat?

Most of the Honeywell thermostats wouldn’t have a dedicated reset button as such. To reset these devices, you would need to access the menu and scroll through to the reset option, which is a straightforward process.

How do I troubleshoot my Honeywell thermostat?

To reset a Honeywell thermostat, you’d need to press the reset button on the thermostat itself. In order to reset these devices, you’ll need to open the menu and scroll down to find a “Reset” option.

How do I get my Honeywell thermostat off hold?

It is possible to remove a hold on your Honeywell Thermostat by changing the temperature of the device yourself. In order to get rid of a long-term hold, you can tap ‘+’ or ‘-‘ and then tap “Cancel.”

How long does a hold last on the Honeywell thermostat?

For a short time, the next schedule is put on hold. To make the temporary hold stay in place for a set amount of time, you can set a timer. The only way to get rid of a permanent hold is to override it yourself. However, this can’t happen until you do it yourself.


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Last update on 2023-11-12

Lance Ulanoff is a renowned tech journalist, commentator, and on-air expert with over 36 years of experience. He has held esteemed positions including Editor in Chief of Lifewire and Mashable, where he delved into the impact of technology on daily life. Lance's expertise has been featured on major news programs globally, and he has made appearances on Fox News, CNBC, and the BBC.