If you have encountered Error Code 90403 on your TP-Link router, it is frustrating as it perplexes the users. It indicates a problem with the router’s configuration, firmware, or network settings.
So, let us first understand the causes responsible for this error and then dive straight into the solutions for troubleshooting and fixing the issue.
Also, read: Unable To Access Router IP Address Or Web Interface [Fixed]
Why Am I Getting The Error Code 90403?
The main causes of error code 90403 are discussed below:
- Outdated firmware
- Network configuration issues
- Hardware or software glitches
- Connection problems
- Factory settings corruption
- Internet connection issues
Fixing Error Code On TP-Link Router
Here are some easy troubleshooting steps that will help you to fix the error code 90403 on your TP-Link Router:
1. Check Internet Connection
Error Code 90403 on your TP-Link Archer C80 router typically indicates an unknown error while accessing the router’s control panel.
Checking the internet is the first step and is a crucial one, as checking the connection will help you to find out whether the issue is due to the internet or any other external source.
To fix the issue, first ensure your router is connected to the internet. Check the internet LED light on the router; it should be on. Restart your router to resolve any connectivity issues.
If the connection is stable and the issue persists, then you can focus on other troubleshooting steps that are related to the router settings or firmware.
2. Verify Login Credentials
Verifying the login credentials is essential, as it can sometimes occur due to incorrect or outdated login details, and if you are unable to log in, then using the default login credentials will help you to reset and resolve the error.
So, make sure you are entering the correct username and password, and do not forget to double-check for any typos or spelling errors.
3. Use A Different Browser
Sometimes, browser compatibility issues can cause this error. Try accessing the control panel using a different web browser. Using a different browser can be a helpful troubleshooting step, as the browser you’re using may not be fully compatible with the TP-Link router’s web interface and can therefore cause issues when you try to log in.
4. Clear Browser Cache
Clearing the browser cache is an effective troubleshooting step that will force your browser to fetch a fresh version of the web page and will prompt you to log in again with fresh credentials.
So, clear your browser’s cache and cookies, and then try accessing the control panel again, as it will then allow the interface to function properly and prevent any display or functionality errors.
Here we are showing how to clear the Chrome browser’s cache:
- Click on the three-dots menu from the top.
- Select More Tools and then click on Clear browsing data.
- Select All Time from the time zone.
- Click on all three checkboxes and then select the Clear Data option.
- Confirm if asked.
5. Check Firewall And Security Settings
Checking firewall and security settings is an important step in fixing Error Code 90403 on a TP-Link router, as by doing so you can ensure that the correct ports are open and no essential services are being blocked.
Ensure that your computer’s firewall or security settings are not blocking access to the router’s control panel. You can also resolve the issue and restore proper connectivity to eliminate any misconfigurations that are highly likely causing the error.
You can disable the Firewall for the time being, and here are the steps to do so:
- Type Windows Defender Firewall in the Windows Search and select the top option.
- Next, select the Turn Windows Defender Firewall on or off option.
- Click on the radio buttons to Turn off Windows Defender Firewall for Private and Public network settings.
- Click on OK to confirm.
- Remember to re-enable your firewall and antivirus software later.
6. Update Router Firmware
Updating the router’s firmware will help to fix the bugs in the router’s software, ensure that the router operates smoothly, and also prevent performance issues or network instability.
So, visit the TP-Link website and download the latest firmware for your router.
Follow the instructions to update the firmware and get benefits from the latest technological improvements that might be causing conflict with your settings.
7. Run The Network And Internet Troubleshooter
Network and Internet Troubleshooter is a built-in diagnostic tool that automatically detects and fixes common network-related issues and gets the router working properly again.
So, if you are facing this issue, run the troubleshooter and restore proper communication between your device and the router. Here’s how you can do it:
- Right-click on the Start button and select Settings.
- In the Settings window, select System.
- On the left sidebar, click on Troubleshoot.
- Select Other Troubleshooters.
- Then, Run the Network and Internet Troubleshooter.
8. Connect To 2.4 GHz Or 5GHz
Choosing the right frequency band will provide a more stable and faster connection in areas with heavy congestion and will reduce interference and improve connectivity.
This is how it can be done:
- Access your router’s settings page.
- Select the Wireless tabs from the top.
- Specifically, select the 2.4GHz or 5GHz option to configure the network name (SSID) and password for that band.
Final Words
Now that you have resolved the error code, enhance the overall network performance of your router and enable smooth connectivity for all your devices.
Get in touch with us in the comment section below in case of any doubts or queries.