the app won’t connect to my air pro during setup, it just spins forever on the wifi screen.

Diagnosis

The "infinite spinning" during the Molekule Air Pro setup process is typically caused by a handshake failure between the device's internal WiFi module and your router. This happens because the Air Pro is designed exclusively for 2.4 GHz bands. If your router uses "Smart Connect" or "Band Steering" (where 2.4 GHz and 5 GHz share the same SSID/name), the purifier often fails to negotiate the connection, leading the app to hang indefinitely while waiting for a confirmation signal that never arrives. Additionally, this issue is frequently triggered by mobile device security settings. If a VPN is active or if "Local Network Access" permissions are disabled for the Molekule app on iOS or Android, the app cannot "see" the purifier even if the purifier is broadcasting its own temporary setup signal. You can confirm the purifier is ready for pairing by checking the front LED ring; if it is not pulsing a slow, steady blue, the device is not in discovery mode and the app will spin forever because there is no target device to connect to.

How to Fix It

Follow these exact steps to bypass the connection loop and force a successful pairing:

1. Force Pairing Mode: Locate the WiFi button on the rear of the Air Pro. Press and hold it for exactly 5-7 seconds. Release the button only when the front LED ring begins to pulse blue. If the light is solid or a different color, the app will not find the device.
2. Isolate the 2.4 GHz Band: Enter your router settings via your browser. Temporarily disable the 5 GHz band or create a separate Guest Network specifically named "Molekule_Setup" set strictly to 2.4 GHz. Connect your smartphone to this specific 2.4 GHz network before opening the app.
3. Clear Network Obstructions: Go to your phone's Settings > General > VPN & Device Management and toggle any active VPNs to "Off." On iOS, go to Settings > Molekule and ensure the "Local Network" toggle is switched to ON.
4. Execute the App Sequence: Open the Molekule app and select "Add Device." When prompted to enter your WiFi password, double-check for typos. The app will now attempt to pass the credentials to the Air Pro.
5. Final Handshake: Once the spinning stops, the LED ring will turn solid white for a moment before returning to its operational color. Do not close the app until you see the "Success" confirmation screen.

If That Didn't Work

• Perform a Hard Power Cycle: Unplug the Air Pro from the wall outlet completely. While unplugged, press and hold the power button for 15 seconds to drain the internal capacitors. Plug it back in, wait 30 seconds for the system to boot, and attempt the WiFi button hold again.
• Toggle Airplane Mode: Turn on Airplane Mode on your phone, then manually re-enable only WiFi. This prevents the phone from attempting to use cellular data to "fill the gap" when the WiFi signal fluctuates during the pairing process, which often crashes the setup loop.
• Reset Router DNS: In some cases, the Molekule servers are blocked by aggressive DNS filtering (like Pi-hole or certain ISP security filters). Change your router's DNS settings to Google Public DNS (8.8.8.8 and 8.8.4.4) to ensure the purifier can reach the Molekule cloud for activation.
• Test with a Mobile Hotspot: To determine if the issue is your router or the hardware, set up a mobile hotspot on a second phone using a 2.4 GHz setting. Attempt to connect the Air Pro to this hotspot. If it connects instantly, your primary router's firewall or band-steering is the culprit.

Heads Up

• Distance Matters: During the initial setup, keep your phone within 3 feet of the Air Pro and ensure the purifier is within 15 feet of your router. You can move the unit to its permanent location after the pairing is successful.
• Password Restrictions: Avoid using special characters (like @, #, or $) in your WiFi password if possible; some firmware versions of the Air Pro struggle with complex symbols during the initial handshake.
• Firmware Updates: Immediately after connecting, check the app for a firmware update. Early versions of the Air Pro had known WiFi stability issues that were patched in later releases.
• Avoid Signal Interference: Keep the purifier away from large metal objects or microwave ovens, as these can disrupt the 2.4 GHz signal and cause the device to drop offline frequently.