Introducing Nest ProtectLearn why interconnected smoke alarms are better than standalone smoke alarmsTechnical specificationsGet startedBeginner's guide to the Nest Protect smoke and CO alarmSetup and installation Nest Protect BasicsExplore features and settings Browse all features and settingsControl your Nest ProtectAlerts and notifications Learn how Nest Protect works Learn about Nest SenseLearn why Nest Protect doesn't have wired interconnectChange the language your Nest Protect speaksReplace Nest Protect's batteriesSafety and certifications Learn about carbon monoxideCarbon monoxide levels in your homeWhen to replace your Nest ProtectWhat to do if Nest Protect detects smoke in your homeLearn about the different types of firesSymptoms of carbon monoxide poisoningWhat to do if carbon monoxide is detectedEmergency evacuation planLearn about Emergency ShutoffWhy carbon monoxide (CO) alarms don't need to be installed near the floorFix a problemError codesCan’t connect Nest Protect to the app or Wi-FiWhy Protect’s green power light is on, but the app says the power is outProtect’s speaker or horn aren't verified by Sound Check or Safety CheckupReset Nest Protect and erase all settingsTroubleshoot when nothing happens after removing 1st gen Nest Protect's battery tabTroubleshoot wired Nest Protect power problemsWarranty, manual & returnsWarranty, safety and regulatory informationDownload documents included with Nest ProtectReturn a Nest deviceWarranty Checker