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CO Detector LED Status Light Colors

Updated 

The Carbon Monoxide Detector has several light states that reflect the status of the device and its detection of CO within your home. This guide will highlight the various indicators and their meanings.

Light

Sound

Description

Flashing Green Light

No Sound

Green LED flashes once every 60 seconds, which means the unit is receiving power and also indicates it is functioning properly

Solid Yellow Light

Chirping Once a Minute

Blinking Yellow Light

Chirping Once a Minute

Replace the battery; Batteries are expected to last 3-5 years, depending on placement and usage

Blinking Yellow Light

Chirping Every 2-4 Minutes

Blinking Red Light

No Sound

CO Detected. Move to fresh air as soon as possible

Blinking Red Light

Beeping Every 5-60 Seconds

Dangerous levels of CO detected. Move to fresh air immediately!

No Light

No Sound

Replace the battery; Batteries are expected to last 3-5 years, depending on placement and usage. Contact support if the issue persists after replacing the battery