Don't worry, it took me SEVERAL attempts to reset a sensor...
- Take off the Sensor's cover
- Remove battery
- Make sure the back TMP button is NOT pushed
- Touch the Sensor's body with a magnet
- Insert the battery
- Remove the magnet from the Sensor's body
- Remove the battery
- Re-install the battery
- Reset will be confirmed by double LED blink.
- Take off the Sensor's cover
- Remove battery
- Make sure the back TMP button IS pushed
- Touch the Sensor's body with a magnet
- Insert the battery
- Remove the magnet from the Sensor's body
- Remove the battery
- Re-install the battery
- Reset will be confirmed by double LED blink.