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How to Repair a Doorbell in 11 Steps

        Home & Garden | Home Repairs

5
Test the Terminals
If your doorbell or chime doesn't work, the fault could be in any part of the circuitry -- from a push button to the bell or chimes to the transformer. Before removing any wires at the terminal strip, it's a good idea to tag them so they can be replaced correctly.
If your doorbell or chime doesn't work, the fault could be in any part of the circuitry -- from a push button to the bell or chimes to the transformer. Before removing any wires at the terminal strip, it's a good idea to tag them so they can be replaced correctly.

If you have a chime assembly with three or more wires, tag them with masking tape: "T" for transformer, "2" for front door chime, and "1" for the back door chime. Loosen terminal screws, remove all wires, and connect wires labeled "T" and "2" to screw terminals on test bell or bulb. If test bell rings or bulb lights when you push front door button, old chime set is faulty. To check this conclusion, connect wires labeled "T" and "1" to screw terminals on test bell. If bell rings when you push back door button, then you're certain chimes must be replaced.