Fire Stick Error AUTH_3 — What It Means & How to Fix It

What Does This Error Mean?

The AUTH_3 error on your Fire Stick means authentication has failed. The device could not verify your Amazon account or a streaming service login. You may need to sign in again or check your account status.

Affected Models

Fire TV Stick Lite
Fire TV Stick 4K
Fire TV Stick 4K Max
Fire TV Cube

Common Causes

Your Amazon account password was recently changed and the Fire Stick still has the old one
A streaming service subscription has expired or payment failed
The authentication token stored on the device has expired or become invalid
Two-factor authentication on your Amazon account is blocking the Fire Stick login
Too many devices are registered to your Amazon account

How to Fix It

Deregister and re-register your Amazon account on the Fire Stick. Go to Settings > My Account > Amazon Account > Deregister, then sign in again.

This forces a fresh login and gets a new authentication token.
Check that your Amazon account is in good standing. Log in at amazon.com on a phone or computer and verify your payment method is current.

An expired credit card or unpaid balance can cause authentication failures.
If the error is in a specific app (Netflix, Disney+, etc.), sign out of that app and sign back in.

Go into the app's settings and look for Sign Out or Log Out.
Check how many devices are registered to your Amazon account at amazon.com/manageyourdevices. Remove any old devices you no longer use.

Amazon limits the number of simultaneous devices on some plans.
Restart the Fire Stick by unplugging it for 30 seconds. Then try signing in again.

A restart clears cached authentication data that may be stale.

When to Call a Professional

AUTH_3 is an account issue, not a hardware problem. If you cannot resolve it yourself, contact Amazon customer support. They can check your account status and help you re-authorize the device. Call 1-888-280-4331 or use the Amazon Help chat.

Frequently Asked Questions

Will deregistering my Fire Stick erase my apps?

Yes — deregistering removes all apps, settings, and downloaded content. You will need to sign back in and reinstall your apps. It is like a soft factory reset. But it is the most reliable way to fix AUTH_3.

Can two-factor authentication cause AUTH_3?

Sometimes, yes. If two-factor authentication is enabled on your Amazon account, the Fire Stick may have trouble completing the login. You may need to approve the login from your phone or email. Check your notifications for an approval request.

Why does AUTH_3 happen after I change my Amazon password?

When you change your password, all existing login sessions eventually expire. The Fire Stick still has the old session stored. It tries to use the old credentials and gets rejected. Signing in again with the new password fixes it.