Came home to Co2 alarm from Nest Protect going off in garage. I have all 3 doors wide open and it says that the Co2 is getting worse. Moved a Kidder stand alone Co2 detector into the garage and it reads 0 meaning no Co2. Is this the result of a faulty unit?
I can attest to being told by Nest support that my Protect smoke alarm falsely starting was due to a faulty product, and I was directed to order a new one. I have not ordered a new one since the one I have is only a few years old. My support thread was closed out by Google while I was out of town, so am not exploring it further. On the lookout for a more reliable product! I hope you get better results.
I apologize for my late response and thank you for all of your patience while waiting for a reply. I can definitely understand how frustrating your situation must be, but I wanted to make sure that your issue was addressed. Do you still need help with this issue? I know that there's been a delay in response since you posted.
Please let me know if you need further assistance.