Classic 05 and Classic-i series: Press down both the filter and the Wi-Fi buttons simultaneously for 3-5 seconds.
Protect : Hold down the Wi-Fi button for more than 15 seconds to disable the Wi-Fi.
If the WiFi button is still on, try the following:
1. Connect your air purifier to the Blueair App (Add Link to “How do I pair and connect my air purifier to the Blueair App?”)
2. Then hold down the Wi-Fi button for more than 15 seconds to disable the Wi-Fi.