It is controlled by a blend door actuator which is a small electric motor.
Air temperature control blend door actuator.
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A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit.
With the combination of both systems the blend door actuator controls the conditioned air s temperature and leads it to the needed location.
A c heater ac heat air vent door blend actuator for chevy pu pickup gmc truck.
Autozone has the right blend door actuator for your car s ac.
Have a friend switch between modes or temperatures while you watch the actuator.
Dorman a c heater blend door actuator 604 111.
The blend door diverts the airflow to the defroster vents in the upper dashboard the floor discharge for heat or the center vents for air conditioning.
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First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or vent mode controls are moved.
When you turn the knob on your dash to the desired temperature the actuator moves the blend door to achieve the proper mix.
With manual temperature control.
Carmakers have used this basic design for 100 years.
Hvac ac heat defrost front air temp control blend door actuator motor for chevy.
The blend door or vent door mixes warm and cool air to be sent to your vents.
It can take input directly from the climate control switches or if your vehicle has a sophisticated system it can be adjusted by the computer to maintain a constant temperature.
An actuator can go bad in of two ways.
These small electric motors control the flow and blend of hot and cold air to the passenger areas by opening and closing the vent.
As of 2012 the heating and air conditioning systems in most vehicles share many parts including the temperature control on the face of the dashboard and the duct work behind the dashboard.
Check if this part fits your vehicle.
With both systems being combined actuator controlled blend doors regulate the temperature of the conditioned air and route it to its desired location.
Consult the repair manual to identify which actuators control the defrost vent floor mode door and the temperature regulating blend door then peer under the dash and locate the suspect actuator on the heater box.
Air door actuator replaces 15 73952 52495593 89018374 604 112 compatible with chevy gmc cadillac hummer 2003 2014 models hvac blend control actuator air heater blend door 4 6 out of 5 stars 348.
