How to Fix WiFi Not Working on TP-Link Archer AX Series Routers: Firmware Rollback, OFDMA Toggle, and Band Reset Fixes

TP-Link’s Archer AX series covers a wide range of WiFi 6 routers — from the budget-friendly Archer AX10 and AX20 to the high-end AX73 and AX90 — and while they’re generally reliable, WiFi issues do appear after firmware updates, in high-device-count households, or when specific features like OFDMA or Smart Connect clash with older client hardware. This guide walks through every proven fix in order of complexity so you can pinpoint the cause quickly.

Fix 1: Update or Roll Back Firmware

Outdated firmware is behind many Archer AX WiFi complaints, including random disconnections, devices unable to see the 5 GHz band, and WPA3 authentication failures. TP-Link releases firmware updates frequently for the AX series, and they often contain wireless stability patches.

To update, open a browser, navigate to tplinkwifi.net (or 192.168.0.1), and log in. Go to Advanced → System → Firmware Upgrade and click Check for Updates. If a new version is available, click Upgrade and do not power off the router during the process.

How to Roll Back Firmware

If a recent firmware update introduced new instability, you can return to the previous version. Download the older firmware file for your exact hardware version from the TP-Link support page (the hardware version is printed on the label on the bottom of the router — for example, “Ver 1.0” or “Ver 3.0”; using the wrong version file will brick the router). In the admin panel go to Advanced → System → Firmware Upgrade → Local Upgrade, select the downloaded file, and click Upgrade. Note that some newer Archer AX firmware versions include a downgrade block that prevents rolling back more than one major version; if this applies, use the TFTP recovery method described on the TP-Link support site instead.

Fix 2: Toggle OFDMA

OFDMA (Orthogonal Frequency Division Multiple Access) is a WiFi 6 feature that lets the router serve multiple devices in a single transmission. In theory it improves efficiency in crowded networks, but in practice it causes connectivity problems with some client devices — particularly older smart TVs, Chromecasts, game consoles, and IoT gadgets that don’t fully implement the WiFi 6 standard.

On most Archer AX models, OFDMA is found at Advanced → Wireless → Advanced Settings. If OFDMA is currently enabled and you’re seeing dropped connections on specific devices, turn it off and retest. Conversely, if OFDMA is disabled and you have a large number of WiFi 6 clients all competing for airtime, enabling it can noticeably improve throughput in crowded conditions. The setting applies per band — you can disable it on 2.4 GHz while leaving it enabled on 5 GHz if your problematic devices are 2.4 GHz only.

Some Archer AX models (including the AX21 and certain AX23 firmware versions) do not expose an OFDMA toggle in the UI; the feature is either always on or always off depending on the firmware build. If your model has no toggle and you suspect OFDMA is causing problems, updating to the latest firmware is the only lever available.

Fix 3: Disable Smart Connect

Smart Connect merges both WiFi bands under a single SSID and automatically steers devices between 2.4 GHz and 5 GHz. This works well with modern devices but causes frequent disconnections with older hardware that doesn’t handle band-steering transitions cleanly.

To turn it off, go to Wireless → Wireless Settings and disable the Smart Connect toggle. You’ll now have two separate SSIDs — one for each band. Connect devices manually to the appropriate band: use 5 GHz for laptops and streaming devices that are close to the router, and 2.4 GHz for IoT devices and anything far from the router. If disconnections stop after disabling Smart Connect, the problem was band-steering mismatches. See our deep-dive on WiFi band steering for more context.

Fix 4: Manual Channel and Bandwidth Selection

The Archer AX series defaults to automatic channel selection, which works in most environments but can land on a congested channel in apartments or dense neighborhoods. Channel interference from neighboring networks is one of the most consistent causes of slow speeds and random drops.

Go to Advanced → Wireless → Wireless Settings and switch Channel from Auto to a fixed value. For 2.4 GHz, choose channel 1, 6, or 11 — the only three that don’t overlap. For 5 GHz, start with channel 36 and a channel width of 80 MHz. Use a WiFi analyzer app on your phone to see which channels neighbors are using before selecting. If you need maximum throughput for WiFi 6 devices, 160 MHz is available on select Archer AX models (such as the AX73 and AX90) but requires a completely clear DFS-free channel to stay stable.

Fix 5: WPA3 Compatibility Issues

Newer Archer AX firmware defaults to WPA2/WPA3 mixed mode, which lets WPA3-capable devices use the stronger encryption while older devices fall back to WPA2. However, some devices — particularly older Android phones, Windows laptops with outdated drivers, and budget smart home gadgets — fail to authenticate cleanly in transition mode.

If a specific device repeatedly fails to connect or connects but immediately drops, go to Advanced → Wireless → Wireless Settings, select the affected band, and change Security to WPA2-Personal. This is safe for home networks and frequently resolves authentication loops on older clients.

Fix 6: Check MAC Address Filtering and Access Control

If a device can see the network but receives an authentication error or is immediately disconnected, check whether MAC address filtering or Access Control is active. Go to Advanced → Security → Access Control (on some firmware versions it is under Advanced → Wireless → Wireless MAC Filtering). If Access Control is set to Blacklist or Whitelist mode with specific MAC addresses, any device not on the whitelist — or explicitly on the blacklist — will be rejected even with the correct password. Add the new device’s MAC address to the whitelist, or disable Access Control entirely if you don’t actively use it.

Fix 7: Factory Reset

If WiFi remains broken after trying the above steps — or if the admin panel itself is behaving erratically — a factory reset clears all configuration and returns the router to a known-good state.

Software Reset

In the admin panel, go to Advanced → System → Backup & Restore and click Factory Restore. This performs a full reset without touching the physical button.

Hardware Reset

With the router powered on, locate the reset pinhole on the rear panel. Press and hold with a straightened paper clip for approximately 10 seconds until the LED starts flashing rapidly, then release. Wait 60–90 seconds for the router to finish rebooting. After the reset, reconnect to the default SSID (printed on the router label) and visit tplinkwifi.net to run the setup wizard.

Quick Checklist

Update firmware via Advanced → System → Firmware Upgrade
If a recent update caused the issue, roll back to the previous firmware using Local Upgrade
Toggle OFDMA off if older devices are dropping; toggle it on for large WiFi 6 households
Disable Smart Connect and create separate 2.4 GHz and 5 GHz SSIDs
Set a fixed channel — channel 6 on 2.4 GHz, channel 36 on 5 GHz
Change security to WPA2-Personal if specific devices fail to authenticate
Check and disable MAC address filtering or Access Control
Factory reset as a last resort (hold Reset button 10 seconds)

The vast majority of Archer AX WiFi problems are resolved by one of the first four fixes above. If you’ve been through the full list and WiFi is still broken, the TP-Link community forums at community.tp-link.com are active and often have model-specific workarounds posted by other users and TP-Link support staff. For more background on the WiFi 6 features behind these settings, see our guides on what OFDMA does, channel width explained, and WPA2 vs WPA3.