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Resetting your Honeywell thermostat back to its original factory settings is an uncomplicated process. If you are seeking detailed guidance on how to adequately reset your Honeywell thermostat, you've come to the right place.

With a factory, schedule, or Wi-Fi reset, you can revert the thermostat to default settings and clear out any errors or glitches.

So in this guide, I’ll show you how to reset a Honeywell thermostat. Let’s go!

In some cases, the instructions require you to remove the thermostat from its base plate, potentially exposing live wiring. If you come across this requirement, we recommend you isolate the wires beforehand via the circuit breaker box. 

At SmartHomePerfected we always advise readers not to undertake any work they are not competent in performing and if in any doubt, it is best to seek the assistance of a professional.

Honeywell Thermostat Reset: How to Find the Model Number

Before we get into the specifics, the first thing you should do is find the exact model number of your Honeywell thermostat. This can help speed things up since you can breeze through our guide and find the steps to reset your specific model. 

In the guide below, I've included images of Honeywell Thermostats within each range to make it easy to identify the correct one.

Generally speaking, the model name or number of your thermostat is either referenced on the front of the device, is accessible through the digital interface, or printed on a label at the back.

Below are steps to perform, if you need to remove the thermostat from the base plate to access the model number.

  1. If your home thermostat is mains powered, isolate the circuit via the circuit breaker to avoid exposure to live wiring. (Once the power is off, the thermostat may still be on as some models have a battery backup. Some models have a battery door that you can slide up to remove the batteries. For others, the batteries are installed in the back of the faceplate).
  2. Carefully slide/pull the thermostat off the base plate, making sure not to damage the pins or clips. In some models, this is accomplished by pulling from the bottom of the device.
  3. Take note of the model at the back and find the corresponding instructions below.
  4. Reposition the thermostat back onto the base plate.

Model-Specific Instructions

After you've noted down the model name and number of your Honeywell Thermostat, you can check the sections below for the appropriate reset guide.

Make sure to take note of the various settings on the device before resetting, as you'll likely need to reconfigure them.

T10 Pro and T9 Models

Smart Wi-Fi Thermostats with colored touchscreen

honeywell thermostat reset

Resetting your Honeywell T9 and T10 models is relatively straightforward. You only need to issue the reset commands via the settings. Here's how:

Performing a Factory Reset:

  1. Press the Menu icon.
  2. Scroll down to “Thermostat Information.”
  3. Write down the four-digit code under “Date Code.”
  4. Then, press the “back” arrow and scroll to “Installer Options.”
  5. It will ask for a password. Enter the Date Code you just wrote down.
  6. Select “Reset” and then “Factory Reset.”

Performing a WiFi Reset:

  1. Press the Menu icon.
  2. Scroll to “WiFi” and press on it.
  3. Choose “Change Network.”
  4. Pick the new WiFi network and enter the password.
T10 Wi Fi Change
Carrying out a Wi-Fi network change on a Honeywell T10 Pro

Performing a Schedule Reset:

  1. Press the Menu icon.
  2. Scroll to “Thermostat Information.”
  3. Record the “Date Code.”
  4. Press the “back” arrow, and scroll to “Installer Options.”
  5. Enter the Date Code for the password.
  6. Select “Reset” and then “Schedule Reset.”

Performing a HomeKit Reset: 

  1. Press the Menu icon.
  2. Scroll to “Thermostat Information.”
  3. Note down the “Date Code.”
  4. Press the “back” arrow, and scroll to “Installer Options.”
  5. Enter the Date Code as the password.
  6. Select “Reset” and then pick the option titled “HomeKit.”

T5+ / T5 / T6 Pro Smart /T6 Pro Z-Wave Models

Smart Thermostats with Touchscreen

Honeywell T5 and T6 Pros

For the rest of the T-series mid-range models such as the T5 and T6 variations, the reset procedures may be slightly different but the main process is outlined below: 

Performing a Factory/Schedule/HomeKit Reset

  1. Power on the device
  2. Press or hold down the menu button until the menu options come up
  3. Press the left or right arrow keys until you get to the option: “Reset”
  4. Touch on “Select” to confirm
  5. Then, select the type of reset: “Factory”, “Schedule” or “HomeKit”
  6. Press on “Select” to confirm the rest type
  7. A confirmation screen will pop up, asking “Are you Sure.” Confirm your decision by touching on “Yes.”

T4 Pro

Programmable Thermostat

T4 Pro

The T4 Pro has an entirely different process since you need to head into the advanced setup options menu. 

Here’s how to carry this out:

  1. Simply press the Menu and “Plus” buttons at the same time and hold them down for about five seconds.
  2. This action will display the ISU (Advanced Setup Options) on the thermostat's screen.
  3. Once you're in the ISU menu, use the Plus and Minus buttons to scroll through the various options until you find “Restore Defaults.”
  4. Press on “Select” to confirm and this option will reset all of your thermostat settings back to factory defaults.
  5. To reset your schedule, continue scrolling to the right, and you'll find “Reset Schedule.”

Lyric Round Smart Thermostat

Smart Thermostat with Circular Interface

Lyric Round

Although discontinued, you might still be using a Lyric Round Smart thermostat. Therefore, I’ve decided to include its reset guide also. 

So, here’s how to go through with the reset:

Factory Reset

  1. Press and hold the Weather/Cloud button for 5-10 seconds.
  2. Wait for the menu button to appear.
  3. Scroll to “Factory Reset” and select it.
  4. Choose “OK”, followed by “YES”.

Wi-Fi Reset

  1. Press and hold the “Cloud” icon.
  2. Scroll to the Wi-Fi option and select it.
  3. Scroll to the Setup option and select it.

HomeKit Reset

  1. Press and hold the “Cloud” icon.
  2. Scroll to the HomeKit Reset option and select it.

9000 Series

Programmable Thermostat with colored-touchscreen

9000 series

With a colored touchscreen, the 9000 Wi-Fi models have an entirely different process than the other models. 

Performing a Factory Reset

  1. Press the “Menu” button.
  2. Scroll down and select “Preferences.”
  3. Scroll down further and choose “Restore Factory Settings.”
  4. Press “YES” to confirm, and you're done.

Carrying out a Wi-Fi Reset

  1. Select “Menu.”
  2. Choose “Wi-Fi Setup.”
  3. Follow the on-screen instructions to complete the reset.

Resetting the Schedule

  1. Press the “Menu” icon.
  2. Select “Preferences”.
  3. Choose “Restore Default Schedule”.

8000 Wi-Fi Models (8320 & 8680 VisionPRO)

Programmable thermostats with LCD touchscreen

VisionPRO 8000

These thermostat models come with a 10-inch LCD screen and require 4 AA batteries to operate properly. 

Here’s how to reset the 8000 Series of Models:

Factory Reset

  1. Ensure your thermostat is “On” 
  2. Press on “System” 
  3. Then, press and hold the center black buttons for 5 seconds
  4. Choose “Reset Factory Settings”

Wi-Fi Reset

  1. Disconnect the router's faceplate
  2. Briefly unplug the wireless router 
  3. Reconnect the power and faceplate
  4. Press “System” on the thermostat 
  5. Hold the middle buttons to access a new screen 
  6. Set the left number to “0900”, and the right to “0”, then press “Done”
  7. On your computer, choose “Thermostat Wi-Fi”
  8. Connect to your home network

Schedule Reset

  1. Tap on “System” on the thermostat.
  2. Press and hold the blank box in the center
  3. After a new screen pops up, change the left number to “0165” and the right to “1”, then press “Done” 

8321 Wi-Fi Model

Programmable Thermostat with touchscreen

Honeywell 8321

So here’s how to carry out resets for the Honeywell 8321 Models

Factory Reset:

  1. Press “Menu”.
  2. Choose “Dealer Information”.
  3. Note down the date code at the bottom.
  4. Select “Done”.
  5. Enter “Installer Options”.
  6. Input the date code.
  7. Choose “Reset to Default”.
  8. Press “Yes”.

Wi-Fi Reset

  1. Press “Menu”.
  2. Scroll to “Wi-Fi Setup” using the Down arrow.
  3. Select “Wi-Fi Setup”.
  4. The Wi-Fi reset is now complete.

Schedule Reset

  1. Press “Menu”.
  2. Scroll to “Preferences” using the Down arrow.
  3. Select “Preferences”.
  4. Scroll to “Default Schedule” using the Down arrow.
  5. Select “Default Schedule”.
  6. The schedule reset is now done!

6000 Series Models (FocusPRO and RTH6500WF)

Programmable Thermostat

FocusPRO 6000 Series

Factory Reset

  1. Turn on the thermostat.
  2. Press and hold the “Fan” and “Up” arrow buttons together.
  3. After 5-10 seconds, release when the display changes.
  4. Press the 4th button from the left until “90” appears.
  5. Use the “Up” arrow to change the digit to “1”.
  6. Press “Done” to complete the reset.

Wi-Fi Reset

  1. Hold the “Fan” and “Up” arrow buttons on the thermostat.
  2. Wait for the display to change.
  3. Press buttons until “39” appears on the left side.
  4. Use the “Down” arrow to change “1” to “0”.
  5. Press “Done” to complete the Wi-Fi setup.
  6. On a mobile device, access “Device Settings” and choose the thermostat's Wi-Fi network.
  7. Connect and then open the Honeywell Thermostat Wi-Fi page using the IP address.
  8. Select your home Wi-Fi network and press “Connect”.
  9. A “Connection Success” message confirms completion.

Schedule Reset

  1. Press and hold the “Up” arrow and “Fan” buttons.
  2. Change the number on the left to “85”.
  3. Change the number on the right to “1”.

Other Models

If your model is not covered by this guide, I've collated a list of user manuals for Honeywell thermostats which you can view here. These manuals contain full reset instructions to get you back up and running,

References

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4 Comments

  • Daniel Gillette
    Posted April 5, 2021 at 11:39 pm

    I have a Model TH6320 WS2003 Date code may6*2019. lost wifi in power outage. Have X by internet icon. Can’t find information on how to get signal from internet back? Help

    • CS
      Posted February 23, 2022 at 1:27 pm

      I have a T6 thermostat installed at a second home. The phone app shows the thermostat offline, is there a way to reset the WiFi without being in front of the thermostat? Have confirmed the WiFi is working and it will be a while before I am back at the property and hope there is a way to do this with a PC rather than the app. Any suggestions?

  • JB
    Posted September 17, 2020 at 8:19 am

    The instructions on your site worked! I needed to perform a factory reset on a thermostat (WiFi enabled 6000 series) but I could not find the instructions anywhere I looked, including manuals. The instructions here were quick and easy, thanks.

    Potential correction for your steps: “Honeywell 6000 Wi-Fi models” step 6. Pressing down did not work for me, pressing up did. Step 7 I did not need to press and hold, just press.

    • Daniel Walsh
      Posted September 22, 2020 at 2:44 am

      Thanks JB! Glad the instructions helped.

      Appreciate the correction, I’ve updated the 6000 series instructions based on your message.

      Best of luck!

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