1. There must be a short circuit. Remove the battery to see if there is any water or if there is anything else connecting the power lines. You can use a hair dryer to blow.
2. It may be that there is a problem with the circuit inside the bell. There are several reasons for this. It may be the weather, or it may be man-made. If you don't understand, it's better to find someone to have a look. In addition, before maintenance, if the doorbell is noisy, temporarily remove the battery of the doorbell.
