Vacuum shows E12, Wi‑Fi or app connectivity features not working (for smart Bosch cordless models)

Safety first: Connectivity issues do not usually pose an electrical hazard, but always remove the battery before opening any covers.

• Reset connectivity: Follow the user manual to reset network settings (often by holding a specific button combination for several seconds).
• Check app and router: Ensure the Bosch app is up to date and that your router is operating on a supported band (usually 2.4 GHz). Move closer to the router during pairing.
• Power cycle: Remove the battery for 1–2 minutes, then reinsert and attempt pairing again.
• Inspect antenna (if accessible): On some models, a small antenna wire or PCB antenna is visible near the control board. Ensure it is not broken or disconnected.
• Firmware update: If the app offers a firmware update and the connection is intermittent, try updating while the vacuum is near the router and fully charged.
• Service if persistent: If E12 remains and wireless functions are critical, the main PCB or wireless module may need replacement.