Dispatched to down thermostat. U it is out install September of 2019. Customer doesn't have matience agreement. Thermostat was black when I arrived. Customers stated that they had a power outage for a second and the thermostat just went out after he reset it. Thermostat isn't under warranty because of power surge. I installed the old thermostat on the wall to get him heating. And gave estimates for replacement and membership. Unit is working properly upon departure.