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Latch Water Sensor Troubleshooting

The water sensor indicates that the device is offline. How do I know which water sensor needs attention?

  1. Residents do not have the ability to view which individual water sensors have fallen offline. 
  2. To find out which device needs attention, visit the “Activity” section via the top-level navigation.
  3. To view activity for a subset of devices, you may filter based on 
    1. Hub
    2. Leak Detector
    3. Light
    4. Thermostat
    1. Unit
    2. Device Type
    3. Date range
  4. The logs will indicate the name of the device, the type, as well as the time it fell offline.

Deactivating and Reconnecting the Latch Water Sensor

To re-install the Water Sensor, you need to deactivate and reactivate the water sensor via the Latch Manager app for iOS.

To deactivate the device

  1. Open the Latch Manager app on iOS, select the property and view “Smart Devices"
  2. The affected device will have a red status indicating that the Device is disconnected.
  3. Select the device and on the detailed device view select “Forget this device”

To re-pair the water sensor to the Latch Hub.

  1. From the Latch Manager iOS app, scan the QR code on the water sensor switch
  2. After the water sensor has been created, tap the ‘Pair’ button to put the hub in pairing mode.
  3. Then, put the water sensor into pairing mode. 

Note: When the battery is first inserted, the water sensor will automatically enter pairing mode for 30 seconds. If a network is not found after 100 seconds, the sensor will go into sleep mode. To wake the sensor again, press the pairing button once on the underside of the water sensor to trigger the pairing process.

The water sensor is not pairing

  1. Your water sensor is not in pairing mode if the light has a single blink every few seconds.
  2. To put it in pairing mode, take out the battery and press and hold the button on the underside of the water sensor.
  3. While holding the button, put the battery in and count to 3.
  4. Let go of the button. The sensor is in pairing mode if it blinks in rapid succession.

I don’t know if my water sensor successfully paired to the hub:

  1. In the Latch Manager App, check that the water sensor is showing up in the building devices list.
  2. If it has successfully paired at least once, the connectivity status will be “Connected.”
  3. You can test leak detection by placing a finger on both prongs on the underside of the water sensor. The device will beep and any users added to the property, including property managers with device management permissions and phone numbers saved in Latch Mission Control, will receive an SMS.


What battery do I use in my Water Sensor? How do I change it?

The unit is powered by a single CR2 battery. To change the battery:

  1. Remove battery lid from the top of the water leak sensor.
  2. Replace with one CR2 battery.
  3. The Water Sensor will automatically begin re-pairing to the Latch Hub.
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