Blinking yellow light on Nest Doorbell (wired)

A blinking yellow light means that your Google Nest Doorbell (wired)  or Nest Doorbell 2nd gen (wired) isn’t getting enough power. It may turn off your video stream to preserve battery
life, but it should continue to work like a standard doorbell.

• You may need to upgrade the transformer that the chime’s wires are connected to.
• Contact a local pro to have them check the voltage and install
  a new transformer.

Nest Doorbell lights and sounds