How do you fix a doorbell that doesn't ring?

Fixing a residential wired doorbell system that fails to ring when the push button is pressed requires a systematic diagnostic approach to check power and electrical continuity. First, locate your doorbell transformer (often mounted on a junction box near the electrical panel or utility room) and test its output voltage with a digital multimeter to ensure it supplies the correct low voltage, typically 16 to 24 volts AC. Second, inspect the chime unit inside the house for stuck plungers or loose wire terminal screws. Third, check the outdoor push button wiring. You can troubleshoot doorbell circuits safely by shutting off power before handling transformer wires. You can verify that your corrective action is successful when securing loose terminal connections, replacing a faulty push button, or installing a new transformer restores a loud, clear chime.