How to install a new doorbell

1. Disable the electricity. Make sure that all circuits that supply electricity to the old doorbell and door chime are turned off. Use a circuit tester to insure there is no power in the device.
2. Disable the electricity. Make sure that all circuits that supply electricity to the old doorbell and door chime are turned off. Use a circuit tester to insure there is no power in the device.
3. Remove old doorbell. Remove the cover and use a screwdriver to detach the old doorbell button from the wall. Pull it away from the wall and expose the wiring.
4. Connect the wires to the new button. Thread the wires through the base of the unit and wrap the ends of each of the wires to the positive and negative terminals. Now use the screwdriver to secure the wires into position.
5. Attach the new doorbell switch to the wall. Use the screws provided to secure the plate into position, and then slide the cover over the device until it snaps into position.
6. Remove the old chimes. Remove the cover from the chimes, and use the screwdriver to detach the device from the wall or ceiling where it is mounted. After pulling the chimes away from the surface, detach the wires and use a piece of electrical tape to secure them to the area surrounding the hole.
7. Connect the wires to the new chimes. Remove the cover from the new chimes, and run the wires through the guide channel to the two terminals. Wrap the ends of the wires around the appropriate terminals, and screw the holding screws into position.
8. Secure the new chimes into position. Place the new chimes over the hole and use the screws provided to attach the device to the wall or ceiling. Once the chime plate is secured, fit the cover over the device and gently push until it snaps into place.
9. Restore power, and test the doorbell. Use the circuit tester to make sure the current is flowing through the system properly. Then push the doorbell. If the chimes function properly, the task is complete!

Here is a helpful video from Expert Village: