My Nest doorbell has been installed for almost 3yrs, and in the last few months, the doorbell chime does not work on the doorbell, will not broadcast to the Nest hubs, and the mechanical chime also doesn't work. I have made sure the notifications are on, verified the wiring on the doorbell, and the doorbell is connected to the wifi. My wifi/network is solid, and there are no issues with other devices connected to the wifi. I have noticed this problem with my in-laws.
I have gone through all the troubleshooting steps and still having this issue. Now the doorbell chime doesn't work most of the time.
Sorry to hear you're experiencing this, I can imagine this has been stressful for you. Please fill out this form, and a higher tier of support will reach out to you with next steps. As a side note; we unfortunately do not offer replacements for parts. If your device is no longer under warranty, we aren't able to offer a replacement, We're sorry for the inconvenience.