For safety reasons, the outdoor heater only emits a Bluetooth signal when it is turned on and heating. This is to prevent unauthorized access and control.
To control the device via Bluetooth, you first need to turn on the heat using the remote control or the button on the side of the device. Then the app will be able to locate it.
If desired, you can change the setting 'Device Bluetooth control' in the app so that the device is always available on Bluetooth as long as the power switch is on. Then you can turn on the heat via your phone.