Nest no longer supports Nest Secure. It will not be accessible in the Nest app and will no longer connect to the internet. You cannot use the Nest app to check the status of your Nest Secure, control your Nest Secure devices, or receive notifications from your alarm system.
For more information, go to this Community Forum post.
With the Nest app, the Owner of a Nest home can create and change the passcodes used to lock or unlock the Google Nest × Yale Lock. You can set a unique passcode for each person who has access to your Nest home, including guests that have Home Entry Only.
Each person who shares access to your Nest home gets a unique passcode that helps identify them when they use their passcode. This passcode is unique to the person and can’t be the same between people. Passcodes should not be shared to maintain the security of your home.
A passcode is a 4 to 8 digit number that you enter on the Nest × Yale Lock’s keypad to lock or unlock the door. You can change your own passcode as often as you like and set passcodes for people with Home Entry Only access.
Important things to know when creating passwords
Here are some things to keep in mind when creating or changing a passcode:
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To create or change a passcode your device must be connected to Wi-Fi.
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The Nest app won’t let you set the same passcode for people who share access to your Nest home. Everyone must have a unique passcode so that you are aware of the activity in your home when someone uses their passcode on your lock.
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Do not share your passcode with other people to maintain the security of your home.
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Do not set a passcode and share it with multiple people. This helps maintain the security of your home so that you know who has used a passcode and when they used it.
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Passcodes must be 4 to 8 digits long.
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The Nest app won’t let you use easy to guess passcodes like 111111 or 123456. Pick a number that’s easy to remember, but would be hard for anyone else to guess. Avoid using birthdays or other identifying information when choosing a passcode.
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Only the Owner or people with Full access to a Nest home can change a passcode. If you have Home Entry Only access, contact the Owner of the Nest home or somebody who has Full access and get them to change your passcode for you.
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You can only have 20 passcodes (the owner plus 19 others) for each home in your account in the Nest app (3 homes maximum).
How to create a new passcode
To create a new passcode for someone, first check that your device is connected to Wi-Fi. Then you’ll need to add them to your Nest home. Then the Nest app will automatically generate a passcode for them. This option is in Settings 
Each passcode is linked to a specific person, whether you’ve invited them to share Full access or given them Home Entry Only. People with Home Entry Only access will only be given a passcode.
How to change an existing passcode
To change an existing passcode, your device must be connected to Wi-Fi.
Anyone with Full access can:
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Change their own passcode
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Change the passcode for someone who has Home Entry Only access
Note: If you have Home Entry Only access, you’ll need to ask someone with Full access to change your passcode for you.
To change your passcode
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On the Nest app home screen, tap Settings
.
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Tap Family & Guests
.
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Tap You to change your own passcode.
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Tap Passcode.
If you sign in with a Nest Account, you’ll enter your account password, minimize your phone’s keyboard, and press Continue.
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Enter a passcode you’ll remember between 4 to 8 digits long.
Note: If another person is using this passcode, a notification will pop-up to prompt you to Choose a different passcode. Passcodes must be unique so you can see who locked and unlocked your lock in History
.
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Tap Show passcode to view the passcode.
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Tap Save. If you sign in with a Google Account, you’ll receive an email that your passcode has been changed.
.To change someone's passcode who has Home Entry Only access
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On the Nest app home screen, tap Settings
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Tap Family & Guests
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Tap the name of the person you’ve given Home Entry Only access to.
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Tap the Show passcode eye
icon to view the passcode.
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Tap Change passcode.
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Enter a passcode between 4 to 8 digits long.
Note: If another person is using this passcode, a notification will pop-up to prompt you to Choose a different passcode. Passcodes must be unique so you can see who locked and unlocked your lock in History
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Tap Save.
icon to view the passcode.If you forgot your passcode
If you forgot your passcode and you’re the Owner or have Full access, simply follow the steps above to change your passcode.
If you have Home Entry Only access, you won’t be able to choose a new passcode for yourself. Contact the Owner of the Nest home or somebody who has Full access and get them to change your passcode for you.
For your own security, Owner passcodes cannot be stored or accessed from the Google home or Nest app.
Once support stops for Nest Secure on April 8, 2024, Nest Guard will no longer be able to connect the Nest x Yale Lock to Wi-Fi. If you are currently locked out and forgot your passcode, you can attempt to use an active guest passcode to unlock your door if you previously created one.
To find out if you have an active guest passcode
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On the Nest app home screen, tap Settings
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Tap Family & Guests
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Tap the name of the person you’ve given Home Entry Only access to.
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Tap the Show passcode eye
If you do not have an active guest passcode or your guest passcode does not work and cannot connect the lock to Wi-Fi, you need to contact your local locksmith to gain entry to your home. For your own security, Google support does not have access to your passcodes and won’t be able to assist you in unlocking the door.
Who can change a passcode
If you have Full access, you can change your own passcode, and you can change the passcode of somebody with Home Entry Only access. But you can’t change the passcode of anybody else who has Full access.
If you're the Owner of the Nest home and you need to prevent someone from gaining entry to your home, you can remove their access to your Nest home, which revokes all access. This option is in Settings
How to set a schedule
You can set a schedule that allows someone with Home Entry Only access to lock and unlock your lock only at certain times. These permissions are set for individual users, and the setting applies to their passcode. On the Nest app home screen, select Settings
Troubleshooting passcodes
Tips for entering your password on Nest x Yale Lock
If you’re having trouble entering your passcode using the keypad on your lock, here are some tips:
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Your lock will block passcode attempts for one minute if you enter an incorrect passcode five times. If you have Full access, you can use the Nest app to unlock and change your passcode. On the Nest app home screen, select Settings
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Make sure you’re entering your current passcode. If you’re not sure what your passcode is, use the Nest app to change it to something you can easily remember.
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If one or more buttons on your lock doesn’t seem to work, contact Nest for further troubleshooting.