Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to replace a doorbell [title] Turn off the electricity to the doorbell. [step] Even though there's not much current running through it, the doorbell is an electrical appliance. Find the switch indicating the doorbell unit on your home's circuit breaker and flip it to the " off " position.

Ending1: It should now look like a chime indicator that adjusts each time someone tries to turn on the doorbell. [substeps] It also helps to leave the noise pedal off the back of your doorbell so you can turn it back on when the chime takes hold. Ending2: This will stop the flow of electricity and allow you to work safely. [substeps] Attempting to remove or modify your doorbell without first making sure that the electricity is off could result in a nasty shock. Ending3: [substeps] There's nothing worse than having the wiring stripped when your doorbell has been replaced. [title] Use a 9 mm open-box doorbell. Ending4: [substeps] After turning off the power, it may take anywhere from a few seconds to a few hours for the chime to start ringing. [title] Unplug the doorbell from the wall.

Answer format: ending1/ending2/ending3/ending4