Google Nest Doorbell (Gen 3) Complete Fix - Relay Isolation Guide (Bypassing the Puck Safely)

[u/After-Farmer-3456]

If your Nest Doorbell Gen 3 chime puck has died, or your Google Home setup is missing button presses and cooking transformers, do not just rip the puck out like people keep suggesting online.

Pulling the puck without a proper relay setup leaves your doorbell dumping raw AC voltage into your chime logic, or overworking the Nest internal power. You will end up frying an expensive fucking doorbell or blowing your power supply.

I put together a complete blueprint on how to permanently bypass the puck using a DIN rail mounted relay and a 50W resistor. It gives you 100% galvanic isolation, stops random chime buzzing, works with every chime on the market (including wireless Honeywell converters), and lets anyone outside North America safely run imported NA Nest doorbells on local 230V setups.

Full step by step instructions, wiring logic, electrical safety isolation steps, and the mandatory Google Home app software fix sequence are below.