Asus RT-AC66U Router Not Working

First reported on r/printers on June 26, 2026.

Users may experience Asus RT-AC66U router not working issues. This is due to a known issue with the router firmware. To fix the issue, users can try updating their router firmware or resetting their router.

What it looks like

• Router not working
• Router offline

How to fix it

1. Unplug the power cord from the back of the router.
2. Wait for 30 seconds.
3. Plug the power cord back into the router.
4. Wait for the router to boot up.
5. Try connecting to the internet again.

Affected products

• Asus RT-AC66U

Sources

• (HELP) Canon Pixma Pro-200 error code C000 — reddit:r/printers

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Search terms covered: asus rt ac66u router not working, router offline