ASUS Router WAN Disconnected Error: How to Fix It
Easy 15-45 minutes High Severity
Verified June 2026
- Error Code
- WAN: disconnected
- Brand
- ASUS Router
- Product Type
- networking
- Severity
- High
- DIY Difficulty
- Easy
- Estimated Fix Time
- 15-45 minutes
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Tools You'll Need
- Ethernet cable (for testing)
- Computer or mobile device
- Small pin or paperclip (for factory reset)
How to Fix Error Code WAN: disconnected
-
Check Physical Cable Connections
-
Power Cycle Your Modem and Router
Always unplug devices before handling cables to prevent electrical damage -
Test with Different Ethernet Cable
-
Check WAN Connection Type Settings
-
Clone MAC Address if Required
-
Update Router Firmware
Do not power off the router during firmware update as this can permanently damage the device -
Factory Reset Router
Factory reset will erase all custom configurations including WiFi passwords and port forwarding rules
Parts You May Need
Cat6 Ethernet Cable
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Network Cable Tester
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Cat6 Ethernet Cable
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Network Cable Tester
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Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
Cat6 Ethernet Cable
Check Price on Amazon
Network Cable Tester
Check Price on Amazon
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When to Call a Professional
Contact your ISP if the modem itself isn't working, if you need help with PPPoE credentials, or if the router continues showing WAN disconnected after trying all steps. You may also need professional help if you're uncomfortable accessing router settings or performing a factory reset.Frequently Asked Questions
Why does my ASUS router keep showing WAN disconnected?
Common causes include loose Ethernet cables, modem issues, incorrect PPPoE login credentials, outdated firmware, or ISP service outages. Start by checking all cable connections and power cycling your equipment.
How do I know if my modem or router is causing the WAN disconnection?
Connect a computer directly to your modem with an Ethernet cable. If you get internet access, the issue is with your router. If not, the problem is with your modem or ISP service.
What is PPPoE and do I need it for my ASUS router?
PPPoE (Point-to-Point Protocol over Ethernet) is a connection type that requires a username and password from your ISP. Check with your internet provider to confirm if you need PPPoE, DHCP, or Static IP configuration.
Can a bad Ethernet cable cause WAN disconnected errors?
Yes, damaged or faulty Ethernet cables are a common cause of WAN disconnection. Always test with a different cable if you're experiencing connectivity issues.
Will factory resetting my ASUS router fix WAN disconnection issues?
Factory reset can resolve software-related WAN issues but will erase all your settings. Try other troubleshooting steps first, and only factory reset as a last resort.