Had this issue with our gen 1 doorbell too. Basically the doorbell is offline from November/Decenber through mid-spring. We have a wireless router 5' from the doorbell. Put in brand new wiring (the doorbell shows a green light). Have tried reinstalling it. Nothing works.
If you've had two doorbells going offline regularly in the same location, the problem could be Wi-Fi signal strength and/or bandwidth, regardless of the location of your wireless router. Counting our router/modem, we have 3 wired Wi-Fi access points, and we have 900 Mbps down and 16 Mbps up; our three Google Nest Hello Doorbells and other cameras all stay online during Minnesota USA winters with temperatures down to -20 degrees Fahrenheit.
Does your doorbell transformer meet Google Nest's requirements (https://support.google.com/googlenest/answer/9247132?hl=en).
Do you have a green status light on your Gen 2 Google Nest Doorbell? Did you have a green status light on your old Google Nest Hello Doorbell?
Have you checked your status lights (https://support.google.com/googlenest/answer/9268073?hl=en#zippy=)?
So you have had a green status light on both of your doorbells, indicating "everything is working normally....Nest doorbell is turned on, connected to Wi-Fi network, and is processing images in its view", but both doorbells still showed offline for months?
Thanks for trying to isolate the issue with your doorbell. Let’s sort this out — a few questions: what’s the voltage of your transformer? How’s the temperature of the doorbell (warm, hot, cold or normal)? What country are you located in? Has there been any recent power outage in your area? Also, has it been exposed to direct sunlight?
Here are some troubleshooting steps you can try:
Important: When the doorbell shows a blue pulsing light when connected to a computer, it means it’s working. They may be issues on your wires or transformer. I recommend scheduling a visit with our partnered Nest Pro.
I appreciate the help, MplsCustomer.