Doorbell Chime not working

[PatAS]

I just had a wired Nest Doorbell Gen 2 installed. The problem is my mechanical chimes inside my home.  At my request, both indoor chimes (upstairs and downstairs) were tested by an electrician and both were fine with my mechanical wired doorbell.  I have read through other posts and have gone through the app, even following one suggestion to switch to an electronic doorbell and increase the length (time) of the chime. Nothing is working from a chime perspective in my home. I have been using the Google Home app. I already have thermostats on the Nest app. What can we try to rectify this problem? I am not willing to have my phone in my hands 24 hrs a day to see if someone is at the door. I'd rather be hearing the chime.

[MplsCustomer]

@PatAS 

What about your doorbell transformer? Google Nest says "The Nest Doorbell (wired, 2nd gen) has higher power requirements than most doorbells" (https://support.google.com/googlenest/answer/12153643).

We have 1st gen Google Nest Hello Doorbells, but had to upgrade to a 16V 30VA transformer because our second doorbell would not ring our indoor doorbell chime, and you have 2 chimes to ring.

Is your chime connector wired correctly for 2 chimes with one doorbell? There are diagrams in the Help link I provided; maybe they will help. The second diagram is mislabeled; instead of "Two Nest doorbells, two chimes" it should say "Two Nest doorbells with one chime". (I've asked them to fix the label, but they haven't.)

[PatAS]

Thanks - I'll look into that and get back to you.

[PatAS]

@MplsCustomer Thank you so much for your suggestions.  I had an electrician in last night to replace the wimpy previous transformer and voila! Chimes working!