When you turn the knob on your dash to the desired temperature the actuator moves the blend door to achieve the proper mix.
Passenger blend door actuator.
The blend door or vent door mixes warm and cool air to be sent to your vents.
The one is located behind the glove box and the other on the left side of the glove box about where the trunk locking button is.
Also called hvac actuators these small electric motors control the flow and blend of hot and cold air to the passenger areas by opening and closing the vent doors that let the air through.
If your car or truck passengers don t seem to be getting all the benefits of your vehicle s heating or a c system you could have a non working a c heater blend door actuator.
Blend door actuator replaces aa5z 19e616 c yh 1779 604 234 compatible with ford lincoln vehicles explorer 2011 2017 taurus 2008 2017 flex 2011 2016 mks and mkt 2011 2015.
2010 ford taurus limited blend doors actuators replacement w dual controls there are two passenger actuators used on this vehicle.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or vent mode controls are moved.
Also check out how to change the passenger heat door actuator here.
An actuator can go bad in of two ways.