AEG AX91-404 Error Code Could not connect: Meaning, Fixes & Troubleshooting

AEG AX91-404 error code Could not connect ("Could not connect") means the AEG Wellbeing app could not establish the required network connection with the AX91-404 during onboarding. Typical reasons are an incompatible Wi‑Fi band, weak signal, blocked phone permissions or temporary router issues. This page covers how to fix the issue and how to prevent it from recurring.

• During setup the app shows "Could not connect" and fails to finish onboarding.
• The purifier does not appear in the AEG Wellbeing app device list after setup attempts.
• Setup process stalls or times out even though the purifier is powered and in setup mode.

• Phone is connected to a 5 GHz Wi‑Fi network (purifier requires 2.4 GHz for onboarding).
• Weak Wi‑Fi signal between router and purifier during setup or unstable network.
• Phone app lacks necessary permissions (local network/location) or mobile data/VPN interferes.
• Temporary router settings (guest network isolation, firewall) or DHCP limits preventing device joining.

1. 1
   Confirm Wi‑Fi band: log into your router or check its settings and ensure a 2.4 GHz SSID is active and visible. If your router uses the same SSID for both bands, temporarily separate them (create distinct 2.4 GHz name) for setup.
2. 2
   Move the purifier and phone close to the router (within 1–3 meters) during initial onboarding to rule out signal issues, then try setup again.
3. 3
   On your phone, open Settings → Wi‑Fi and tap the active network → Forget this network. Reconnect to the 2.4 GHz network and then retry onboarding in the app.
4. 4
   Check app permissions: ensure the AEG Wellbeing app has Location and Local Network (or equivalent) permissions and that no VPN or ad‑blocking app is active during setup.
5. 5
   Reboot the router (power off for 30 seconds) and the purifier, then attempt onboarding before other devices reconnect fully (reduces DHCP conflicts).

• Trying to set up using a 5 GHz Wi‑Fi network instead of 2.4 GHz.
• Keeping mobile data or VPN active during onboarding (causes routing issues).
• Not granting the app local network/location access so it cannot detect the purifier.
• Attempting setup from a different room with a marginal Wi‑Fi signal.

• Do not attempt internal repairs, open the purifier or tamper with internal electronics to resolve a connection error.
• Do not repeatedly factory reset network hardware without checking simple fixes first — unnecessary resets can complicate network settings.

• Always unplug the purifier before performing any physical maintenance (cleaning, moving filters).
• If you suspect a hardware fault (burning smell, unusual noises) stop attempts to connect and contact AEG support — do not continue powering the unit.

If you have followed the steps above (2.4 GHz network, app permissions, power‑cycle, router reboot) and the AX91-404 still shows Could not connect during onboarding, contact AEG support. Provide the support team with: model (AX91-404), a brief description of the problem, steps you tried, router make/model and screenshots of any app errors. AEG support can confirm whether a firmware update, replacement part, or service is needed.

• Keep the AEG Wellbeing app and purifier firmware updated — check the app for firmware prompts after successful setup.
• Use a stable 2.4 GHz Wi‑Fi network for the purifier and avoid frequent SSID name changes.
• Position the purifier where it receives a reliable Wi‑Fi signal or use a dedicated access point for smart home devices.