Check out the steps here if you haven’t already:
Most common fixes are going to be to Exclude it again, change out the batteries or perform a factory reset.
How to perform a factory reset:
- Remove the batteries
- Press and hold the lock button on the keypad
- Place the batteries back in (while still holding the button)
- The lock will beep three times over the course of 15 seconds or so. After the 3rd beep release the button.