why does my archer ax73 randomly reboot itself once a day

Diagnosis

The random daily rebooting of the TP-Link Archer AX73 is typically caused by one of two distinct issues: a scheduled reboot timer enabled in the firmware or a critical power instability affecting the internal voltage regulators. When the router reboots at roughly the same time every 24 hours, it is almost always a software-level "Auto-Reboot" setting designed to clear the system cache and prevent memory leaks. This is a feature, not a bug, though it often catches users by surprise as there is no visual warning on the hardware before the cycle begins. However, if the reboots occur at irregular intervals but feel "random," the root cause is likely thermal throttling or a failing DC power adapter. The AX73 utilizes a high-performance quad-core CPU that generates significant heat during heavy WiFi 6 traffic. If the router is placed in a confined space or on a carpeted surface, the internal sensors will trigger a hard reset to prevent permanent silicon damage. You can confirm this by checking the "System Log" under Advanced settings; look for "Kernel panic" or "Warm boot" entries immediately preceding the disconnection.

How to Fix It

To stop the scheduled daily reboots and stabilize the system, follow these precise steps:

1. Connect a computer to the router via an Ethernet cable to avoid disconnection during the process. Open a web browser and navigate to tplinkwifi.net or 192.168.0.1.
2. Log in with your administrative password. Navigate to the Advanced tab at the top of the dashboard.
3. In the left-hand sidebar, expand the System menu and select Reboot Schedule.
4. Locate the toggle switch for "Reboot Schedule." If it is set to "On," slide it to the Off position. If you prefer to keep it on but change the time, adjust the "Time" dropdown to a window where no one is using the network (e.g., 4:00 AM).
5. Click Save at the bottom of the page.
6. While still in the Advanced menu, go to System > Firmware Update. Check for any available updates. If a version is available, click Update and wait for the router to cycle. New firmware often addresses stability bugs related to the AX73's memory management.

If That Didn't Work

• Replace the Power Adapter: The AX73 is sensitive to voltage drops. If your power brick (12V/2A) is failing or plugged into a crowded power strip, the router may brown out during peak WiFi 6 transmission bursts. Plug the router directly into a wall outlet or use a high-quality surge protector. If the issue persists, replace the adapter with an identical 12V DC power supply.
• Optimize Thermal Airflow: Ensure the router is standing vertically on its included base. If it is lying flat or tucked inside a media console, the vents on the bottom and sides are blocked. Elevate the router by 1-2 inches using small rubber feet or a cooling stand to allow air to flow underneath the chassis, which prevents thermal-induced reboots.
• Disable Smart Connect: In some firmware versions, the "Smart Connect" feature (which merges 2.4GHz and 5GHz bands) causes a crash when too many legacy devices attempt to steer between bands. Go to Advanced > Wireless > Wireless Settings and toggle "Smart Connect" to Off. Manually name your 2.4GHz and 5GHz SSIDs differently to reduce the CPU load associated with band steering.
• Perform a Hard Factory Reset: If a corrupted configuration file is causing a memory leak, a soft reboot won't fix it. While the router is powered on, use a paperclip to press and hold the Reset button on the back panel for exactly 10 seconds until all LEDs flash. Reconfigure the router from scratch without importing a previous backup file.

Heads Up

• Avoid using third-party DNS settings (like Google or Cloudflare) if you are experiencing stability issues until you have confirmed the hardware is stable; occasionally, DNS timeouts can mimic the appearance of a router reboot.
• Keep the router away from other high-heat electronics, such as cable modems or gaming consoles, as the AX73's heat sink is passive and relies entirely on ambient air.
• Check your Ethernet cables for damage; a short-circuit in a WAN cable can occasionally trigger the router's internal protection circuit, causing a sudden power cycle.
• Regularly clear the system log to make it easier to identify new patterns of instability after applying a fix.