Doorbell on the fritz? It may be more efficient to repair it instead of replacing it. Your doorbell might just need to be cleaned, or need a new wire or part. For a doorbell that doesn't sound like it used to, try these techniques:
• Replace rubber grommets – If your doorbell's rubber grommets are stiff or easily broken, you may experience a muffled chime. New rubber grommets will clear that up.
• Clean chime parts – If the clappers, plungers, or gong on a doorbell are grubby or covered in dust, the chime may be barely audible. Remove the chime box cover and use a cotton swab dipped in alcohol to remove the debris. It is not recommended that you clean electric or digital chimes in this way.
• Upgrade the transformer – A home with multiple doorbells may result in frail or late chiming, so installing a transformer with higher low-voltage production will provide more power to each doorbell.
*Remember to always use caution when working with electricity in your home, or call an electrician when in doubt.