Actuator, Blend Door: Description
The blend door actuators (1) for the front Heating, Ventilation and Air Conditioning (HVAC) system are reversible, 12 volt Direct Current (DC) servo motors. The available dual zone HVAC systems have two blend-air doors, that are controlled by two blend door actuators.
The blend door actuators are mechanically connected to the blend-air doors and are contained within a black molded plastic housing with an integral wire connector receptacle (2). An output shaft with splines (3) connect the blend door actuators to the blend door linkage and three integral mounting tabs (4) allow the actuators to be secured to the air distribution housing. The blend door actuators do not require mechanical indexing to the blend door linkage, as they are electronically calibrated by the A/C heater control.
The A/C heater control must be recalibrated each time an actuator motor is replaced. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
The blend door actuators are interchangeable with each other and the actuators for the mode and recirculation-air doors.