Doorbell Randomly Rings and Gets Stuck

Doorbell Design

• Doorbell systems operate with four main components: a push button, transformer, bell and the wires or wireless devices that connect them. The transformer converts higher voltages to lower, safer currents making doorbell troubleshooting a low-risk task. However, always use caution when handling doorbell parts and working with electricity. (See References 1)

Wireless Doorbells

• Random ringing is a common problem with wireless doorbells, particularly among less-expensive models. The most likely cause is interference from outside signals. Outside interference often is caused by nearby car alarms, gate or garage-door openers, a neighbor’s wireless doorbell unit or other similar electronic devices. To correct the problem, change the frequency of the unit or reset the house code. (See References 2)

Wired Doorbells

• Wired doorbell units can stick and ring randomly when a problem occurs at the outdoor push button. To test the push button, turn off all power connecting to the transformer and take the button off the wall. You will see two wires extending from the wall to the button. Disconnect one of the wires from the button and restore power. If the random or continuous ringing stops, you have located the problem and will need to replace the push button. If the problem persists, disconnect the power again and examine the wires for a short circuit where insulation has failed and the wires are touching. Then, either replace the wires or cover exposed wires with electrical tape. (See References 3)

When to Replace the Unit

• When battling more extensive problems with your doorbell’s transformer or chime unit, you may want to replace the doorbell unit rather than calling an electrician. Additionally, you may want to upgrade inexpensive wireless units experiencing repetitive interference to models with multiple frequency settings and interference-blocking features.