If you are trying to connect your device to your account in the app, you need to connect your device to the Wifi network broadcasted by the installed Mysa thermostat. The Mysa network will look something like this when you search for available Wifi networks:
If you don't see this network, or you only see the network of another thermostat you have already connected, please check the thermostat to see if it is in pairing mode. If the thermostat is in pairing mode, you will see the following pattern on the display:
If you don't see this symbol, you need to enable pairing mode. This can be done by resetting the thermostat. You need to hold down the up and down arrows for about 10-15 seconds. The symbol above will appear on the thermostat, and the Wifi signal from Mysa will now be available for fifteen minutes (the signal only lasts that long to save on power).
Another way to reset your Mysa is to turn off the breaker connected to the thermostat, then turn it back on about a minute later. This will put the Mysa in pairing mode.