How to Add a Second Doorbell Chime From the Transformer

This blog post will show you how to add a second doorbell chime from the transformer. Many people don’t know this, but you can add a second doorbell chime to your transformer. If you’re like most people with an older home, you most likely have one doorbell system for the entire house.

This is because, in the past, it was not possible to have separate systems. However, now there are different options for new homes and renovations that allow homeowners to choose what works best for them! 

How to Add a Second Doorbell Chime From the Transformer

The easiest way to do this is by adding a second transformer near your front or back door so that if someone rings either bell on your property, they will be able to hear it from anywhere on the property where they are located. To add a second doorbell chime from the transformer, you need two door chimes and an electrical box.

Step by Step Guide on How to Add a Second Doorbell Chime From the Transformer

Step One: Finding the Transformer

To add a second doorbell chime, you need first to locate where the transformer is. In most cases, the transformer will be located very close to where your original doorbell wiring is, as it needs as little power as possible to function. These units are usually found outside of houses but can also be found inside in some cases.

Step Two: Disconnecting the Transformer

Once you have found where the transformer is, you will need to disconnect it from its power source. Because these units are supposed to be supplying shallow power, they usually only have two wires coming out of the hot and ground.

These should look like round prongs and should be very easy to pull apart. The transformer may or may not have a third pin for the chime unit itself; this should also be disconnected and removed as it will no longer be needed once you install your additional doorbell.

Step Three: Adding the New Chime Unit

After you have completed Step Two, you can begin to add your second doorbell chime unit. This will be the same as if you were adding a new traditional doorbell; however, it is recommended that any additional chime units require their transformer and an additional ground wire instead of piggybacking off the original transformer.

Doorbell Chime Unit

To make this as easy as possible, you should be using a doorbell chime unit that is battery or solar-powered. These units will not require an additional transformer and are usually very simple to install. The new chime unit may also have its transformer included in the box; if it does not, make sure you label your wires carefully so that they are not connected to the wrong terminals.

Step Four: Connecting Your Additional Door Chimes

Once you have finished installing your second doorbell chime, you can connect your additional door chimes to it. Again, this is very simple; make sure the wires are long enough to reach their destination and then twist them onto the terminals of each unit.

You should not need any additional accessories for this process; if you need anything like screwdrivers or wire strippers, make sure to label the wires accordingly and use an insulated screwdriver and wire strippers to protect yourself from shocks.

Step Five: Turning on the Transformer

After you have connected your additional door chimes to your second doorbell chime, you can turn on your transformer. Make sure that it is set to the same settings as before; if you are unsure, check the manual for the unit or call customer service for assistance with this process.

A few minutes after turning your transformer on, your second doorbell chime should begin working. First, make sure that it works properly and then test out both the original doorbell chime and the additional one to ensure that they are playing simultaneously; if they are not, you will need to adjust them both until they do so.

Step Six: Finishing

After completing all of your installations, screw the transformer back together and return it to its original location. Ensure that everything is turned off before doing so; the unit will need to be switched into its standard position to work.

You may want to wait a few minutes before turning on the unit again as the transformer may have to cool down somewhat. Once this has been completed, you can test out your new doorbell chime unit and ensure it is working as intended.

Lastly, after everything has been tested and confirmed to work properly, replace any faceplates or other features that you had removed before reattaching them to their original locations. This will ensure that everything looks as before you started this process and prevent any damage from occurring due to the extra installation work. In addition, this will help in how to add a second doorbell chime from the transformer.

Can You Increase the Volume of a Doorbell?

A doorbell is simply an electrical device that makes a noise when pressed. When the button is pressed, it completes an electrical circuit between two wires to ring or chime. The idea behind connecting more than one bell to the same transformer is to increase the number of circuits, allowing more opportunities for completing the circuit.

Chance That Pressing One Switch

In other words, by adding bells, you increase the chance that pressing one switch will cause all of the switches to activate and produce a chime from multiple sources. In most cases, it is possible to increase the volume of a doorbell sound using this method, but there are some limits. First, you should plan on spending extra dollars on your transformer and new bells.

Frequently Asked Questions

Can You Put 2 Doorbells on Transformer?

Yes, you can. In order to do this, you will need to purchase a switch that is compatible with your current transformer.

Then after installing the switch, you can connect two doorbells to it, and they will ring simultaneously.

Can You Connect 2 Doorbells?

Yes, you can connect 2 doorbells. The difference between these two types of devices is that one is wired and the other wireless. The wired doorbell has a cord that connects it to your wall outlet, while the wireless one is battery-powered.

Why Do I Have Two Doorbell Transformers?

Your doorbell transformer is the component that converts AC current to DC current. When you press the button on your doorbell, it sends a signal through your home’s wiring to an electromagnet at the transformer, which then turns on and off with the current.

If there are two transformers, it could be because you have a separate power source for each bell. It could also be that you have a second doorbell that was installed after yours or that your first one has been moved from its original location.


The transformer is a great way to add a doorbell chime. If you have more than one door, or if your existing ones don’t work well in the space they are located in, this device may be perfect for you! With so many features and options available at different price points, it won’t take long before you find something that fits perfectly with your needs.

Whether you want motion detection capabilities like on some models of doorbells, or if you’re going to record your voice, there is a doorbell chime out there for you. In the end, we also offer some practical tips on how to add a second doorbell chime from the transformer.

You may also read-How to Wire a Doorbell From a Light Switch

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