5 Star Service
Why did my Fibaro Door & Window Sensor stop working after changing the battery?
We’ve seen some cases were the user inadvertently reset the sensor while replacing the battery.
The reset procedure is detailed in Section III of the manual:
Although this looks like it would be impossible to do without meaning to, if you think about the steps you might take when replacing the battery you’ll see why this could happen:
Step 6 is the tricky bit as it could take a couple of minutes for the sensor to stabilize and start reporting back on the Z-Wave Network.
It’s not unnatural for somebody to think it’s not working immediately and therefor check the battery, inadvertently resetting the sensor!
If it's been reset as above, then the sensor lost its Z-Wave network data.
You will unfortunately need to Exclude it from your Z-Wave controller and then Include it again.