my archer ax73 gets really hot to the touch on the top, is that normal

Diagnosis

The TP-Link Archer AX73 is a high-performance WiFi 6 router utilizing a powerful quad-core CPU and multiple radio chains to handle high-bandwidth traffic. Because it is designed as a fanless system to eliminate mechanical failure and noise, it relies entirely on passive cooling. The chassis is engineered to act as a thermal conductor, moving heat away from the internal SoC (System on a Chip) and radiating it through the top plastic casing and ventilation slats.

When you feel the top of the device getting hot, you are feeling the heat sink doing its job. Under heavy loads—such as 4K streaming, large file transfers, or managing 20+ simultaneous devices—the CPU generates significant thermal energy. If the heat is concentrated near the center of the top panel, it is typical behavior. You can confirm if the heat is reaching critical levels by checking for "thermal throttling," which manifests as sudden drops in WiFi speed or spontaneous reboots during peak usage.

How to Fix It

To optimize the thermal performance of your AX73 and prevent the hardware from throttling, follow these precise placement and configuration steps:

1. Vertical Orientation: Ensure the router is standing upright on its base. The AX73 is designed for convection cooling, where hot air rises. If it is lying on its side, the airflow pattern is disrupted, trapping heat against the internal components.
2. Clearance Requirements: Maintain a minimum of 6 inches (15cm) of open airspace above the top ventilation grilles. Never place the router on a shelf where the ceiling is less than 10 inches above the device.
3. Surface Selection: Place the router on a hard, flat surface such as a wooden desk or a metal shelf. Never place the unit on carpet, fabric runners, or inside a wooden media console, as these materials insulate the bottom vents and prevent the intake of cool air.
4. Antenna Positioning: Adjust the six external antennas to a 90-degree angle. While primarily for signal, this prevents the antennas from blocking the airflow around the top perimeter of the chassis.
5. Firmware Optimization: Log into the web interface (tplinkwifi.net), navigate to Advanced > System Tools > Firmware Upgrade, and ensure you are on the latest version. TP-Link frequently releases updates that optimize CPU clock speeds to reduce unnecessary heat generation.

If That Didn't Work

If the device remains painfully hot to the touch or continues to reboot, try these advanced interventions:

• Active Cooling Modification: The most effective solution for high-traffic environments is adding a USB-powered 120mm cooling fan. Place the fan on a small stand blowing directly across the top vents. This converts the passive cooling system into an active one, often dropping internal temperatures by 15-20 degrees Celsius.
• Disable Unused Features: Navigate to the settings and disable features you aren't using, such as "HomeCare" or specific QoS (Quality of Service) rules. These features require constant CPU cycles to inspect packets, which increases the thermal load on the processor.
• Power Supply Verification: Inspect your power brick. Ensure it is the original 12V/2.5A adapter. Using a third-party adapter with incorrect voltage or amperage can cause the internal voltage regulators to overheat, leading to excessive chassis heat.
• Channel Width Adjustment: If you are using 160MHz channel width on the 5GHz band, try dropping it to 80MHz. The wider channel requires more processing power for signal modulation, which generates more heat during heavy data transfers.

Heads Up

• Avoid "Dust Blankets": Every three months, use a can of compressed air to blow out the top and bottom vents. Dust buildup acts as an insulator and can lead to permanent hardware degradation.
• Avoid Direct Sunlight: Never place the AX73 on a windowsill or in a spot that receives direct afternoon sunlight; the black plastic absorbs UV heat, which can push the internal temperature past the safety threshold.
• Heat vs. Failure: Remember that "hot to the touch" is normal for WiFi 6 hardware. Only be concerned if the plastic begins to warp, smells of burning ozone, or if the WiFi signal drops consistently every few hours.