Door Bell Troubleshooting

Doorbell wiring is often the cause of doorbell failure. A broken wire interrupts the flow from the transformer to the button or the button to the bell. Doorbell circuits run on a two-conductor cable. You simply send the power out to a button and then from the button to the bell.

Remove the wires from the bell or chime and label them front and back door. Now remove the doorbell butoons and disconnect those wires. They are labeled on the door bell itself. Twist the two wires labeled front door together at the doorbell and go to the front door to test the lines. Using an ohm meter or continuity tester, check to see if you have a complete circuit (closed circuit). If there is no reading, you have an open circuit and a bad wire. It must be replaced. If it reads good, connect those wires back up and check the back door wiring.

Twist the two wires labeled back door together at the doorbell and go to the back door to test the lines. Using an ohm meter or continuity tester, check to see if you have a complete circuit (closed circuit). If there is no reading, you have an open circuit and a bad wire. It must be replaced.

If both wires have checked out, you have another problem. Now the problem may lie in the power feed from the circuit breaker.

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