This issue can occur with wired Nest doorbells and should not affect battery-powered Nest doorbells when hardwired to the chime.
“Phantom” ringing that happens at random times is typically due to fluctuations in the voltage sent to your chime. While small power spikes usually won’t cause the chime to sound, larger ones can. This might happen when your Nest doorbell switches to night vision.
- Turn off Night Vision in your Nest doorbell settings to temporarily prevent phantom ringing.
- You probably need to upgrade the transformer that's connected to the chime’s wires.
- Contact a local HVAC professional to have them check the voltage and install a new transformer.