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Doorbell Transformer

By Edited Nov 13, 2013 1 0

Doorbells are very useful devices that can be attached at a post beside your front gate, at the wall beside your living room door or just about anywhere appropriate that can surely get your attention once a visitor or a client arrives. Doorbells allow you to keep track of the visitors who are expected to come and for people who will arrive anytime. You can do whatever you want without worrying about missing someone who is expected to come or transactions with important people just because you did not hear them calling outside your house. Doorbells operate with the assistance of a doorbell transformer, to allow them to ring that familiar sound once the visitor presses the button.

Doorbells are low voltage devices, which is the primary reason why there is a need for a transformer. The standard residential electrical circuit is 110 volts and doorbell wiring usually utilize 24 volts or less to operate smoothly. A doorbell transformer is cheap and can be bought at local electrical shops or appliance centers. However, doorbells are still prone to be damaged most of the time despite of their simple operation. One of the most common issues is about the doorbell transformer, which causes the doorbell to stop working and chiming. Here is a simple guide on how you can troubleshoot your doorbell transformer.

When checking the insides of your doorbell, you will see three rear screw terminals for the three components namely, the front door button, the rear door button and the transformer. But before getting into this complicated task, make sure that you have properly turned off your doorbell to avoid any accidents associated with electricity.

Prepare the fundamental tools like screwdriver, wire nuts and vinyl tapes. Start by unscrewing the terminals and once you have opened these terminals, you need to pull the wall cover at the back of the transformer. You will see the wiring connections that deliver that 'ding-dong' when a visitor arrives and presses the button. Start tracing the wires that connect the doorbell and the transformer, remove the electrical tape or the wire nuts that keep the second wires bundled together. Test these wires using a voltmeter adjusted to the lowest alternating current reading above 20 volts. Carry out the test by letting the probe touch the wires. If the reading is about 10 volts or higher, then there is no problem with the transformer.

To further verify the source of the problem, place the probe on the second wires found either at the front or rear terminals, if the doorbell chimes, then the problem is with the wiring of the buttons. On the other hand, if the initial test results to a zero reading you have to get the transformer and test it directly. Be careful in removing the transformer to avoid further damage. Test the transformer by probing. If a reading appears, the problem lies in faulty wiring. If there is no reading, the transformer needs replacement. In addition, you can check the wirings for loose connections and possible damages.

Fixing your doorbell transformer can save you of buying new doorbells. By doing these simple tests, you will soon be hearing that familiar 'ding-dong' when someone arrives.


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