How to Test Your Doorbell Transformer 

Just wanted to say thank you for the video. After watching it I checked my setup for my Ubiquiti doorbell camera and saw what it wasn't putting out enough power. I swapped one wire and now it's working like a champ.

Thanks for the video Steve! Very informative and helpful. Always good to see what we should expect to see along with your explanations. Thanks!

Thank you so much, I really apprecited your video. Very well done and to the point.

That was thorought in a short timeframe. Well done!!

@SteveBrainard - Thank you!... I installed a WIRED RING DOORBELL, but was unable to program it, due to low voltage. Until I saw your "replacement transformer" with the 3 discrete possibilities, I had no idea such a set-up was possible. I did a bit of wire "re-arranging"; the doorbell stopped flashing, and started circling (as designed). I'm grateful for the clear explanation. Thanks again!

We ended up exchanging this model for the slimmer version ru-vid.comUgkx0jZ_lGlDVJhDnmagEU8gn47cmfPNlLQU because it was too wide for the only door trim area that made sense to mount it on. However, we should have just noted the dimensions prior to purchasing. Otherwise, we love the doorbell. It works perfectly, and the video is very clear, even at night.

Very helpful, thanks!

Thank you. I learn how to connect the wires to get the required voltage.

Extremely, Thank You!!!

Question: How can I determine if any current/how much current is flowing to our doorbell? Not sure how to read multi-meter.

On step down side got 0.1 ohms... that still hooked to power so idk if it should still be 2.8???

When I test the ohms on my transformer I get 89.9 ohms on the 120 volt side. It started making the speaker for my doorbell hum.

On the bright side your narration is very clear and pleasing to the ear. But I had to watch another video to get what I needed. It’s likely people who know “what we’d expect to see in ohms,” or about the secondary side, yadda, yadda, yah wouldn’t need this type of advice in the first place. I’m left wondering if the goal was to impress with your knowledge of electrical current or to help DIY’ers check if their transformers are producing enough volts .

I have adt doorbell cameras on my side and front door. The led lights won't come on nor does my doorbell work anymore. Could this be the reason?

My Nest Hello stopped working so this is very timely. I don't have a new transformer yet

How to check amps for the same transformer ?

My doorbell/address light transformer showed a voltage of 18.6 from the secondary lines. It should be at 16 volts. Should I replace a new transformer?

It says measure in AC and AC volt has two choices; 750 and 200. I have the same meter as you. But you tested a choice on the bottom. Which one is right?

120v input is ok. Check transformer no output voltage. Replaced new one check all resistance is fine. Still no volt out. Would you give me an ideal please

Any reason why my transformer would be humming incessantly

Can I use a 24v transformer on a 16v doorbell chime?

Ok, so the Ring door bell keeps blowing the transformer. Any tips?

My building is 60 years old and has loose insulation blown in, how do I find my transformer to check it ?

How can you attach the clip type tri voltage transformer tightly to an electrical box?

Question: How can I determine if any current/how much current is flowing to our doorbell? Not sure how to read multi-meter.