the app won't connect to my grill anymore, it just spins and says searching for device.

Diagnosis

The "searching for device" spinning wheel on the Green Mountain Grills (GMG) app typically indicates a handshake failure between the Daniel Boone Prime Plus controller's internal WiFi module and your local network. This is rarely a problem with the app itself, but rather a state of "zombie connection" where the grill believes it is connected to the router, but the router has dropped the IP assignment or the DHCP lease has expired. This most frequently happens after a power flicker, a router firmware update, or if you have a dual-band router that is attempting to force the grill onto a 5GHz band. The Daniel Boone Prime Plus uses a 2.4GHz radio; if the router tries to "steer" the device to 5GHz, the connection will drop and the app will spin indefinitely because it cannot locate the grill's specific MAC address on the network. You can confirm this by checking your router's connected devices list—if the grill is not listed or shows as "offline" despite the controller being powered on, the network handshake has failed.

How to Fix It

To restore the connection, you must clear the cached network credentials and force a fresh pairing sequence. Follow these exact steps:

1. Power down the grill completely using the main power switch. Wait 30 seconds to allow the capacitors in the controller to discharge fully.
2. Power the grill back on. Once the screen initializes, press the MENU button.
3. Use the arrow keys to scroll through the menu until you highlight WiFi Settings. Press the select button to enter this submenu.
4. Scroll down to Reset WiFi and select it. The controller will prompt you for confirmation; select Yes. The screen should indicate that the WiFi is now in "Setup Mode" or "Ready for Pairing."
5. Open the GMG App on your smartphone. Ensure your phone is connected to a 2.4GHz WiFi network. If your router uses a single SSID for both 2.4GHz and 5GHz, you may need to temporarily disable the 5GHz band in your router settings.
6. In the app, select "Add Device" and follow the prompts. When asked for the network password, enter it carefully—the grill is case-sensitive.
7. Wait for the app to confirm the connection. The controller screen should now display "Connected" and show a signal strength indicator.

If That Didn't Work

• Assign a Static IP: Log into your router's admin panel (usually 192.168.1.1 or 192.168.0.1) and find the GMG grill in the device list. Assign a "Static IP" or "DHCP Reservation" to the grill's MAC address. This prevents the router from changing the grill's address, which is a common cause of the app losing the device after a few days of uptime.
• Check Signal Interference: The Daniel Boone Prime Plus has a metal chassis that can act as a Faraday cage, blocking signals. If your router is more than 30 feet away or separated by a brick wall, install a WiFi range extender halfway between the router and the grill. Ensure the extender is also configured for 2.4GHz.
• Clear App Cache: Go to your smartphone's Settings > Apps > GMG App > Storage and select "Clear Cache" and "Clear Data." Uninstall the app and reinstall it from the App Store or Google Play. This removes any corrupted local tokens that might be preventing the app from seeing the "new" connection.
• Hardware Module Inspection: If the "Reset WiFi" option in the menu freezes the controller or returns an error, the internal WiFi antenna cable may have shaken loose during shipping or assembly. With the power off, you can check the controller housing for any loose wires, though this typically requires a technician if the module itself has failed.

Heads Up

• Avoid 5GHz Networks: The Daniel Boone Prime Plus will never connect to a 5GHz-only network. If you have a "Smart" router that merges bands, the grill may intermittently disconnect. Creating a dedicated 2.4GHz Guest Network just for your grill is the most stable long-term solution.
• Power Stability: Frequent power surges can corrupt the WiFi module's firmware. Using a high-quality outdoor surge protector can prevent the need for frequent WiFi resets.
• Firmware Updates: When the app prompts you for a firmware update, do not turn off the grill or close the app until it is 100% complete. Interrupting a WiFi module update can "brick" the connectivity, requiring a full controller replacement.