CO Detector LED Status Light Colors
The CO 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.
**Please note that we no longer offer CO Detectors for the Original SimpliSafe system. If you are having an issue with your Original SimpliSafe CO Detector, please contact support to find out how to upgrade your system.
Green flashing light and no sounds
Yellow steady light and chirping every 1 minute
Tamper Switch Error. Remove the detector from the bracket and test the Tamper Switch by pressing it with your finger. Reattach the CO Detector. If the issue persists please contact support for help.
Yellow flashing light and chirping every 1 minute
Low battery. Remove the detector from the bracket. Press and hold the grey button under the words "DO NOT PAINT" and slide the front panel off. Replace the batteries. Replace the front panel and put the detector back on the bracket.
Yellow flashing light and chirping every 2–4 minutes
Malfunction. Please contact support for help troubleshooting the issue.
Red flashing light and no sound
Carbon monoxide detected. Move to fresh air as soon as possible. The alarm will occur until CO levels drop.
Red flashing light and beeping every 5–60 seconds
Dangerous levels of carbon monoxide detected. Move to fresh air immediately.
No lights and no sounds
Detector is not receiving power. Ensure the battery tab is pulled from the device and fresh batteries are inserted. If you continue to experience issues, please contact support for troubleshooting help.