Tech arrived spoke with customer about duct cleaning and upstairs u it having thermostat issues. Tech checked thermostat and seen that thermostat is failed let customer know that they would need to replace thermostat. Gave customer quote on replacing thermostat or customer supplied thermostat. Customer went to home depot to get thermostat for tech to put on. As of right now system is not operating due to failed thermostat. Customer has declined duct cleaning at this time and will reach back out when ready. Tech put new thermostat on that customer provided. Tested in heat and cooling . System is operating.