No buzz or hum just a chime from the doorbell itself on the outside of the house when you press the doorbell. I have the indoor chime turned on (app setting) and same thing. My guess is it’s the chime itself which costs $30 but looks like it has about $0.30 of parts in it. I’m gonna swap that out and see if that’s it. If not it’s the transformer. The kit comes with a new transformer which is 16V which should be enough for the doorbell, I just really don’t wanna take apart the whole electrical panel to replace the transformer
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