CO2 Detector issue

@pat_329182​ It sounds like your CO Detector's tamper switch isn't held down all the way, which would result in this error. To resolve this, make sure that the CO Detector is fully in its mounting bracket by twisting it until you hear it snap into place. 

If the CO Detector is properly on the mounting bracket, it is possible that the mounting bracket is screwed into your wall or ceiling, causing the plastic to slightly warp. In this case, I would recommend you unmount your CO Detector, slightly loosen the mounting bracket's screws, and then mount the detector back on again.

@pat_329182​ how did you resolve this?  My co just started doing it after being untouched for months.

@Avgjoe Do you see a steady yellow light on your Carbon Monoxide Detector, and does it chirp every minute? If that is the case, that means that the device's Tamper Switch isn't being held down all the way. 

To resolve this, remove the device from its bracket, and then twist it back on all the way until you hear it click into place. This should resolve the error. 

And our CO Detector LED Status Light Colors article in the Help Center goes over the different colors/chirping patterns the CO Detector can produce, and what they mean.