Heater works great and A/C works great when I turn the hot or cold knob. Once I change blow mode to window defrost it stays there for several days even if I change the settings to other blow mode such as feet or face. I know it has to do with one of the actuator but can someone help me pin point the actual name so I can order one. There is heater blend actuator, air flap actuator, air duct actuator, and air door actuator. Thanks.