Restoring a doorbell that has suddenly stopped ringing involves a step-by-step diagnostic process to locate the point of failure. Start by inspecting the indoor chime box for jammed spring-loaded strikers or loose wire terminal screws labeled Front, Trans, and Rear. Next, remove the outdoor push button and test continuity by touching its wires together; if the chime sounds, the button is broken and must be replaced. If nothing happens, test your low-voltage transformer output with a digital multimeter to ensure it reads 16 to 24 volts AC. You can troubleshoot electrical repairs safely by turning off power at the circuit breaker before handling wires. You can verify that your corrective action is successful when replacing a broken push button, securing loose wire connections, or installing a new transformer restores normal ringing functionality.
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