Limited Warranty - archived 1st Generation Nest Learning Thermostat Warranty 2nd Generation Nest Learning Thermostat Warranty (launch to October 2012) Warranty (September 2013 to August 2015) 3rd Generation Nest Learning Thermostat Warranty (September 2015 to December 2015) 1st Generation Smoke + Carbon Monoxide Alarm Warranty (launch to September 2013) 2nd Generation Smoke + Carbon Monoxide Alarm Warranty (September 2013 to June 2015) (November 2016 to October 2018) Nest Learning Thermostat Nest Thermostat E Nest Protect Nest Cam indoor Nest Cam outdoor Nest Cam IQ indoor Nest Cam IQ outdoor Nest Hello