AEG AX91-604 error code The Air Purifier Wi-Fi symbol is flashing, cannot connect to the Wi-Fi network: Meaning, Fixes & Troubleshooting

AEG AX91-604 error code The Air Purifier Wi-Fi symbol is flashing, cannot connect to the Wi-Fi network means the purifier is unable to establish or maintain a connection to your home Wi‑Fi. This can occur during initial setup, after a router change, or when temporary network interruptions, incorrect credentials, or Wi‑Fi band/incompatibility prevent communication between the AX91-604 and AEG cloud services.

• Wi‑Fi symbol on the purifier blinks continuously or flashes instead of staying solid.
• The purifier functions locally (fan runs) but remote control via the AEG app fails or shows as offline.
• App reports setup/connection failed or the device cannot be found during pairing.

• Router is out of range or strong interference from other wireless devices.
• Router is set to 5 GHz only or has 2.4 GHz disabled (AX91-604 requires 2.4 GHz for many setups).
• Incorrect Wi‑Fi password, hidden SSID, or MAC filtering blocking the purifier.
• Temporary router or internet outage interrupting cloud authentication.

1. 1
   Confirm router settings (2.4 GHz and security)
2. 2
   Disable advanced protections temporarily
3. 3
   Check DHCP and IP limits
4. 4
   Test with a mobile hotspot

• Trying to connect to the router's 5 GHz network instead of 2.4 GHz.
• Entering the Wi‑Fi password incorrectly (watch for special characters/case).
• Not power-cycling the router and purifier during setup, which can leave the previous failed state active.

• Do not factory-reset the purifier until you have tried basic network and app troubleshooting (it erases settings).
• Do not change router admin credentials or advanced firewall settings unless you understand the changes — note settings before altering them.

• Always unplug the purifier before moving it large distances or inspecting internal components (do not open the unit).
• When changing router settings, avoid disabling security permanently; use temporary changes for testing only.

If you have completed the steps above (router power-cycle, confirm 2.4 GHz, verify password, move device close, and tested with a hotspot) and the AX91-604 still flashes the Wi‑Fi symbol or cannot pair, contact AEG support. Provide the purifier model (AX91-604), a description of the steps you tried, your router model, and whether the device worked previously. Use the official support article or support channels to escalate the issue.

• Keep router firmware up to date and use a stable 2.4 GHz SSID for smart devices.
• Avoid placing the purifier where metal objects, thick walls, or microwaves can cause interference.
• Record router settings and Wi‑Fi credentials so reconfiguration after router replacements is quicker.