Why does Facebook fail to log in?

Logging in to Facebook can sometimes be frustrating when errors occur. There are a few common reasons why you may be unable to log in to your Facebook account.

You have an incorrect password

One of the most common reasons for Facebook login issues is an incorrect password. Here are some tips for troubleshooting an incorrect password:

Carefully retype your password – a simple typo can cause login issues

Try copying and pasting your password from a password manager to avoid typos
If you have multiple passwords saved, double check you are using the right one for Facebook
Make sure your caps lock is not accidentally enabled which can cause an incorrect password

Consider resetting your password if you are sure you are entering the correct password but it is still not working

You have an incorrect username

Just like an incorrect password, an incorrect username can also lead to login failures. Here are some tips for troubleshooting an incorrect username:

Double check you are entering your username correctly – it is case sensitive

Your username may be your email address or phone number depending on how you signed up
If you have multiple Facebook accounts, ensure you are using the login details for the correct account
If you cannot remember your username, try using the “Forgotten account?” option to recover it

Two-factor authentication is enabled

If you have two-factor authentication enabled for additional security on your Facebook account, you will need to enter your password as well as an authentication code to log in. Here are some tips for troubleshooting two-factor authentication:

Make sure you enter the latest 6-digit code from the authentication app or SMS text message after entering your password
Double check that time and date are set correctly on your device generating authentication codes to ensure the code is valid

Check for any notifications from your authentication app that could indicate why a code is not valid
If you no longer have access to your authentication method (lost device for example), use the options on the Facebook login screen to recover access to your account

Your account was disabled

If your Facebook account has been temporarily or permanently disabled due to violations of Facebook’s terms, you will be unable to log in. Here is what you can do if your account has been disabled:

Check any emails you received from Facebook for details on why your account was disabled and how to appeal
Submit an appeal through the Facebook help center if your account was wrongly disabled
If your account was permanently disabled and you have exhausted all appeals, you will need to create a new account

Facebook is experiencing an outage

Like any website or online platform, Facebook occasionally experiences outages that can prevent logging in. Before getting too frustrated, check if Facebook is currently experiencing any known issues:

Visit Facebook’s status page at https://www.facebook.com/business/help for notifications of any outages
Check sites like DownDetector that track user reports of outages across the web

See if friends/family are also having issues logging in, indicating a wider outage
Try logging in via mobile app or third party apps like Instagram to isolate the issue
Be patient and try again in a bit if Facebook is having technical difficulties

Your browser is not supported

Facebook only supports certain web browsers for accessing the platform. If you are using an outdated or unsupported browser, you may encounter login issues. Here is how to check if browser compatibility is the issue:

Ensure you are running one of Facebook’s supported browsers like Chrome, Firefox, Safari or Edge
Update your browser to the latest version which may resolve any bugs preventing logging in

Try logging in from a different supported browser to isolate the issue
Clear your browser cache and cookies to eliminate any corrupted data
Try accessing Facebook from a private browsing/incognito window

Web proxy or firewall blocking access

If you are on a school or work network, restrictive proxies or firewalls can block access to Facebook. Here are some steps to determine if networking restrictions are causing login issues:

Try connecting to a different WiFi network like a personal hotspot and attempt to log in
On a work network, check with network admin if certain sites are blocked

Try disabling any VPN connections and connect directly to isolate any proxy issues
Clear browser cookies and try to login in private/incognito mode
Access Facebook via mobile data instead of WiFi to bypass network restrictions

Suspicious login flagged

For security purposes, Facebook may block login attempts from unknown devices or locations to prevent unauthorized access. Here are some tips to deal with this:

Verify any emails from Facebook about suspicious or unrecognized logins
Go through Facebook’s account recovery process to confirm your identity if you are traveling or on a new device

Increase account security by enabling two-factor authentication
Change your password if you think someone else may have accessed your account
Clear browser cookies and cache and try logging in again

Facebook site is blocked on network

As mentioned earlier, schools, workplaces or countries with censorship may block access to Facebook entirely. If this is the case:

Try using a VPN service to bypass network restrictions and access Facebook
Connect to a different WiFi network not implementing blocking, like a personal hotspot

Clear browser cookies and try to access the site in private/incognito mode
For censorship at a country level, options are more limited unless you move locations

Session expired from inactivity

For security purposes, Facebook will log you out after an extended time of inactivity. Some common reasons why this occurs:

Leaving Facebook open in a browser tab in the background for a long time
Having an open Facebook session on a public or shared device
Not accessing Facebook for an extended period of time on any device

If your session has expired, simply log back in with your username and password again. Going forward you can avoid this issue by:

Logging out of Facebook when you are done using it, instead of just closing the tab
Not staying logged into Facebook on public devices

Using the “Active Sessions” section of your Facebook security to monitor open sessions

Facebook mobile app crashing

If the Facebook mobile app is crashing, freezing, or bugging out, login issues can occur. Troubleshoot app problems by:

Force closing and restarting the app

Updating the app to the latest version available
Reinstalling the app if it is very buggy
Restarting your mobile device

Checking if Facebook is having any known mobile app issues

Facebook Messenger issues

Since Facebook Messenger is very closely integrated with your main Facebook account, issues with the Messenger app can also prevent logging in. Try the following to troubleshoot:

Reinstall the Messenger app if it is crashing or freezing

Log out then log back into Messenger with your Facebook account
Disable then re-enable Messenger’s integration with Facebook
Clear the app’s cache and data before re-logging into your account

Cookies or cache needing to be cleared

Corrupted cookies or caching issues can sometimes interfere with properly logging into Facebook. Attempting to clear them solves many login problems:

Open your browser settings and clear browsing data/cookies/cache
Try logging into Facebook in a private browsing window

Restart your device or browser to clear out any stuck processes
Update your browser or any security/privacy extensions that can store cookies

Antivirus or firewall conflicts

Security software detecting false positives or blocking Facebook access may lead to login difficulties. Here are some steps to isolate antivirus or firewall problems:

Temporarily disable your antivirus or firewall and attempt to login
Add Facebook to the allowed sites list in your antivirus and firewall settings
Update security software to the latest definitions to resolve detection issues

Reset security software to default settings if improperly configured

JavaScript needs to be enabled

Facebook utilizes JavaScript to function properly in browsers, so issues can occur if it is disabled:

Check your browser settings to ensure JavaScript is enabled

Try logging into Facebook from another browser where JavaScript is definitely enabled
Clear browser cookies/cache and attempt re-enabling JavaScript
Consider resetting browser settings to default if improperly configured

Dark web malware, spyware or viruses

Infections from shady downloads can potentially disrupt Facebook access or steal account credentials. If you suspect this, take measures like:

Run complete antivirus scans to remove any infections
Reset browser settings after removing infections to clear unwanted changes

Change Facebook password via a clean device in case it was compromised
Never download from unverified sources and be wary of email attachments

Problems connecting with ISP or cell service

Any issues with your internet service provider or cell connectivity can interfere with accessing Facebook:

Check for any service outages in your area from your provider
Restart your router/modem to refresh the connection
Connect via alternate means like mobile data instead of WiFi

Try using a VPN service to rule out ISP problems

Facebook server or database issues

As a massive website with billions of accounts, Facebook does encounter occasional technical issues on their end:

Check Facebook’s status page for notifications of any service disruptions

Be patient – login issues from server outages are often resolved in 1-2 hours
Follow @facebook on Twitter for real-time updates on any platform issues
Consider logging in via Instagram or Messenger if available as these often run on separate infrastructure

Account hacked or phished by scammer

Hacked or phished accounts can experience login issues. Watch for warning signs like:

Suspicious posts made on your timeline indicating account compromise
Unusual new friend requests sent from your account to strangers

Forgotten password link not sending a reset email because email is changed
Notifications that account info like password or email were changed

If your Facebook account has been hacked or phished, act quickly to recover it and secure it:

Run antivirus scans to check for keyloggers or other malware
Report compromised account via Facebook’s help pages
Submit identify verification to regain access to your account

Change password to a new, secure one you don’t use elsewhere
Enable two-factor authentication for increased security

Facebook account permanently deleted

If you intentionally deleted your Facebook account, or Facebook disabled it beyond recovery, you obviously cannot log back in:

There is no way to recover a fully deleted Facebook account
Creating a new account also often won’t work if you were banned
Learn from any violations that got your account disabled

Use alternate social networks – Facebook is not the only option

Trying to log in too frequently

Logging in over and over in a short period can trigger security mechanisms to block login attempts:

Slow down – take a break between login trys to avoid temporary blocks

Complete验证码s prompted to verify you are not a bot
Close and re-open browser or clear cookies to reset failed logins
Use Facebook’s “Forgot Password” to reset via email instead of repeated attempts

Facebook login temporarily broken

Like any complex web platform, Facebook’s login system does completely break at times after a bad update or change:

Check DownDetector and Twitter for widespread reports of login issues
Be patient as Facebook engineers will be working hard to fix it

Try logging in via mobile, Messenger or Instagram if available
Third party login apps may work if main login is broken

Conclusion

Troubleshooting Facebook login issues can be frustrating, but is often just a matter of working through possible causes methodically. Keeping your login details and account security updated, staying patient during outages, and contacting Facebook support if needed will help resolve most problems logging in.