Tech inspected system and found duct work to be connected. Upon further inspection technician found thermostat wire was wired in and high voltage was wired in as well. Technician did see thermostat on the wall and wired in. Upon further inspection tech found shaft was warped with key and pulley removed from shaft. Tech found pulley and key were warped as well indicating someone started system up and grinded down the shaft and key and pulley. Will need to replace pulley, key, shaft and bearing for blower. Tech also found no smoke detector on system.