How To Repair A Broken Doorbell

Q: The doorbell in my 1929 home has died. What'due south the easiest and safest way to install a new one?

—Scott Thompson, Red Depository financial institution, N.J.

A: Matt Tomis, master electrician, Tomis Electrical Contractors, replies: Ninety per centum of the fourth dimension, when a doorbell doesn't work it's the fault of the button on the outside because atmospheric condition and abiding utilise wear information technology out. Only information technology'due south also possible the chime or transformer, the other parts of a traditional wired doorbell, take stopped working.

How practice I know if my doorbell transformer is bad?

To pinpoint the problem, only test each component with a multimeter, sold at home centers for under $xv. There'southward no need to shut off the power every bit you troubleshoot considering the transformer steps downward regular 120-volt household voltage to a safe 16 volts or and so.

Doorbell wiring is seldom the crusade of this trouble, but when information technology is, I recommend going with a wireless system and skipping the hassle of rewiring. That simplifies the installation process in onetime houses like yours. Yous'll just have to occasionally replace the batteries.

six Easy Steps to Fix Your Doorbell

Step one: Cheque the Push

Remove the screws holding the button to the door casing. Unscrew the wires from the push button and cross them. If the chinkle rings, and so you've found the problem. Get to Stride three and replace the push. If the chime doesn't ring, get to Footstep 2.

Footstep ii: Test the Push button

Set the multimeter to test for continuity. Place its probes on each of the terminal screws in the back of the push button, then printing the button. If the meter's needle doesn't movement, the button is bad and should be replaced (Step three). If the needle does move, reattach the wires, reinstall the push button, and get to Step 4.

Step 3: Supervene upon the Button, If Needed

Attach the wires to the terminal screws in the back of the new push button and fasten it to the door casing.

Step 4: Test the Doorbell Transformer

Test doorbell transformer with a multimeter.

Y'all'll discover near doorbell transformers well-nigh the main electrical panel. Set the multimeter to voltage setting, and place its probes on the screws where the modest-gauge doorbell wires are attached.

If the multimeter reads 16 volts or so, the transformer is fine; get to Step 5. If it's producing less than xvi volts, call an electrician to supplant the transformer; this involves working with 120-volt wires and post-obit the electrical code.

Pace 5: Examination the Chime

Test the doorbell chime with a multimeter.

Remove the chime'south cover. Get out the multimeter on the voltage setting and touch the probes to the wires. Have a helper push the push button. If the multimeter shows that current is flowing simply the chime doesn't ring, replace it (Step 6).

But if there's no current, the wiring is faulty. If you tin observe the break, brand a splice with 18-gauge wire. If you lot can't, either pull through new wires or install a battery-powered wireless unit.

Step 6: Supersede the Chime, If Needed

Before disconnecting the old wires, characterization them with strips of tape: "Forepart" for front bell, "Dorsum" if there's a back bell, and "T" for transformer. Mount the new chime on the wall, and attach each wire to its accordingly labeled concluding.

If the old wires aren't long enough, splice a short length of 18-estimate wire onto each 1. Button the button to make sure the chime's working, then put on its cover.