EcobeeSupport Help Center Search Search Thermostats Can I install an ecobee SmartThermostat with voice control on my ecobee4 or ecobee3 lite setup? My ecobee thermostat keeps losing power and displaying a "calibrating" message. Why? How do I register my ecobee thermostat? Threshold settings for ecobee thermostats View All (20+) Loading Loading Loading ecobee Support Support hours Monday to Friday 8 a.m. to 11 p.m. EST Saturday & Sunday 9 a.m. to 9 p.m. EST Contact Support WhatsApp Facebook Messenger Email us 1-877-932-6233 (Toll free) 1-647-428-2220 (International) More resources Compatibility checker Rebate finder Professional installation iOS mobile app Android mobile app Privacy Policy & Terms of Use ecobee.com This site uses cookies to provide you with a more responsive, personalized service, and to analyze our traffic. By using this site you agree to our use of cookies. To find out more about ecobee’s use of cookies, please read our Privacy Policy