[PaperBagger'14]

Originally Posted by CroFlames

1000% its your transformer.

I've installed 3 or 4 smart doorbells and its always the transformer.

Super easy to swap out. https://www.lowes.ca/product/doorbel...nsformer-63548

and it's on sale.

What was the issue with the transformer that caused it to not work?

Edit: I did some quick reading and in older homes you may have a 10V doorbell transformer, most modern homes are 24V output. The voltage should be stamped on the transformer or its frame somewhere.