- The “N/A” label on the thermostat does not affect the operation of the sensor or its wiring polarity. The sensor connected to the S1/S2 input works correctly, and the app properly recognizes this input.
- The S1/S2 input is non-polarized, meaning the sensor wires can be connected in either order — there is no need to match specific polarity.
- In summary: even though the thermostat shows “N/A” next to the input, the functionality is unaffected, and wiring polarity does not matter. However, we recommend unifying the labeling across the device and app to avoid confusion for end users.