If your Water Leak Sensor is having trouble being paired, you may need to exclude it first.   

Even if your ZSE42 XS Sensor was never successfully added to SmartThings, exclusion is a kind of soft reset. It can helps with a variety of inclusion and configuration issues.

Here are the steps to try excluding from the SmartThings app:

1. Open your SmartThings app and locate your SmartThings hub under Devices. Tap the hub to see the device details. 

2. Tap the three dots in the upper right hand corner and tap Settings

3. Tap Z-Wave Utilities 
4. Tap Z-Wave Exclusion
5. While the app is searching for a device, click the Z-Wave button 3 times as quickly as possible 
6. The app will indicate when the device is successfully removed. Tap Done.

Once exclusion is confirmed successful, try including the ZSE42 Sensor again. If exclusion still didn't solve the problem, here are some other things to try:

• Give the exclusion process another go. It's possible that the command didn't go through the first time.
• Bring the sensor closer to your SmartThings hub. If it includes successfully from a different spot, the previous spot may be out of range. 
• Once you put SmartThings into inclusion mode, click the Z-Wave button very quickly 4-5 times to ensure the command has gone through.

If you're still seeing issues with the sensor after exclusion and re-inclusion, please send us a message!