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Replacing the Right Actuator?
Blend Door Vs. Mode Door Vs. Recirculating Door

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Actuator doors change position based on selected climate settings. The blend, mode, and recirculating doors each have a specific function and are often not interchangeable.

To accurately identify which actuator door(s) need to be replaced, assess the following:
  • Temperature not reaching selected settings? Replace the blend door.
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Blend Door Actuator
 Adjusts door position at various degrees to achieve the  desired temperature by blending cool air from the evaporator and warm air from the heater core.
  • Airflow direction or vent selection not changing? Replace the mode door.
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Mode Door Actuator
Controls which vent(s) air blows through. It has two positions: open or closed.

  •  Air recirculation not working? Replace the air recirculation door. 
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Air Recirculation Door Actuator
Opens or closes to block or allow ambient air into the system. When closed, the  system recirculates air inside of the vehicle.
Other factors to consider:
  • Lack of airflow could be caused by a clogged air filter or faulty blower motor.
  • A faulty heater core or evaporator can affect temperature.
*DO NOT TEST ACTUATORS PRIOR TO INSTALLING. POWER TESTING MAY DECALIBRATE PRESET DOOR POSITIONS.*
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