Four Seasons 73641 HVAC Recirculation Door Actuator

HVAC Recirculation Door Actuator for Lexus LS400

Restore proper cabin air control with this Four Seasons HVAC recirculation door actuator, part number 73641. It is built for the recirculation door linkage and uses a 5-pin terminal layout with an arm-style linkage and 3 mounting ears for a direct-fit repair on select Lexus LS400 models.

Compatible with 1995-1997 Lexus LS400 applications, this actuator helps return the HVAC system to normal recirculation door movement and consistent airflow control. Four Seasons backs this part with more than 50 years of mobile A/C experience and tests its products for dependable operation.

Key Features

• HVAC air door actuator for recirculation door control
• Arm-style door linkage for the specified application
• 3 mounting ears for secure installation
• 5-terminal pin configuration
• Four Seasons part number 73641
• Fits 1995-1997 Lexus LS400, with 1995 coverage from 10/94

Detailed Description

The Four Seasons 73641 HVAC recirculation door actuator is engineered for select Lexus LS400 vehicles to control the recirculation door inside the HVAC system. When the actuator operates correctly, the system can switch airflow routing as intended, helping maintain proper cabin comfort and ventilation control. This part cross-references DAA1579 for the same application.

Use this actuator when servicing a Lexus LS400 HVAC system that requires a recirculation door actuator with an arm linkage, 3 mounting ears, and a 5-pin electrical connection. The part number 73641 is also referenced under interchange numbers including 8710650240 and ACT1965IM.

Common Issues This Part May Resolve

• Recirculation door stuck in one position
• HVAC airflow not switching between fresh and recirculated air
• Clicking or inconsistent actuator movement behind the dash
• Loss of cabin air control on Lexus LS400 models
• Faulty HVAC door response during climate control operation

Installation Notes and Tips

Verify the vehicle year and build date before ordering, especially for 1995 Lexus LS400 models built from 10/94. Match the actuator’s arm linkage, 3 mounting ears, and 5-pin terminal layout to the original unit before installation. Confirm the HVAC door moves freely so the replacement actuator is not forced against a binding linkage.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. Backed by more than 50 years of mobile A/C experience, this 73641 actuator is built for service-focused HVAC repair on Lexus LS400 applications.