1. Please make sure you are registering the heater in the following order:

   1.1. Go to Add device >> Next >> Choose your product; 
   1.2. Select proprer thermostat in applivation: ADAX WT or ADAX WT2 (WT+BLE) and follow the instructions in the screen.

2. Try to update ADAX WiFi APP to latest version.
3. Try registering using different mobile device: another iPhone or Android.
4. If this does not help, please provide us with: your customer ID, name of the heater, firmware version of the heater.