Tech returned to install thermostat that customer has provided. Let customer know that just putting on this thermostat is not going to control upstairs. System is a zoned system. Thermostat that was installed today will only control main level. Let customer know that he needs to replace zone board. Due to the zone board fried due to back feed voltage. This is also what caused the thermostat to fail . Also there is no heat strips on hvac system. Customer is aware of repairs that need to made for system to operate properly. Customer has declined repairs. Only wanted thermostat for main level installed. Tech checked to verify system is functioning in heat and cooling.