Air Temperature Control Blend Door Actuator

A blend door actuator receives input from the climate control system and and changes the blend of hot cold air entering the vehicles cabin.

Air temperature control blend door actuator.

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. As of 2013 the air conditioning and heating systems in many automobiles share a lot of elements such as the duct work under the dash the control of temperature on the dash s face. Have a friend switch between modes or temperatures while you watch the actuator. These small electric motors control the flow and blend of hot and cold air to the passenger areas by opening and closing the vent.

When you turn the knob on your dash to the desired temperature the actuator moves the blend door to achieve the proper mix. 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. A c heater ac heat air vent door blend actuator for chevy pu pickup gmc truck. It is controlled by a blend door actuator which is a small electric motor.

The blend door or vent door mixes warm and cool air to be sent to your vents. Dorman a c heater blend door actuator 604 111. With both systems being combined actuator controlled blend doors regulate the temperature of the conditioned air and route it to its desired location. An actuator can go bad in of two ways.

With manual temperature control. The temperature door diverts air over the evaporator for cool air or points the flow over the heater core for warm air. 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. 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.

Carmakers have used this basic design for 100 years. First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or vent mode controls are moved. 21 95 4 95 shipping. Autozone has the right blend door actuator for your car s ac.

With the combination of both systems the blend door actuator controls the conditioned air s temperature and leads it to the needed location. 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. 22 05 4 95 shipping.