Reset is a good move if your sensor is unresponsive to commands or shows no LED activity no matter what you try. 

You can reset your ZSE40 4-in-1 Sensor to factory settings by opening the battery cover to release the tamper switch and pressing and releasing the Z-Wave button with a paperclip 10 TIMES quickly within 10 seconds. 

The LED indicator will start flashing immediately after you start clicking the Z-Wave button and then it will flash 4 times AGAIN once the reset is complete. If you don't get 4 flashes (blue or yellow depending on room temperature) around a second after you click the button 10 times with a paperclip, please try again, this time clicking it more firmly and faster.

Hard reset will erase all custom settings and recorded activity so that your device is restored to factory settings. 

After resetting the sensor, try including it again to your Z-Wave network to see if that helped the issue. 

If reset doesn't help or if you have general questions about the process, let us know! We'll be happy to help.