Four Seasons 73646 HVAC Mode Door Actuator

HVAC Mode Door Actuator for Acura and Honda

Restore proper airflow control with this Four Seasons HVAC mode door actuator, part number 73646. It is built with an arm-style door linkage, a 3-ear mounting design, and a 7-pin terminal layout for direct replacement service on select Acura and Honda applications.

Compatible with 1997-1999 Acura CL, 1995-1998 Honda Odyssey, and 1995-1997 Honda Accord, this HVAC air door actuator helps return the climate control system to normal vent, floor, and defrost operation.

Key Features

• Four Seasons HVAC mode door actuator, part number 73646
• Arm-style door linkage for HVAC air door control
• 3 mounting ears for secure installation
• 7-terminal pin configuration
• Engineered and tested for dependable operation
• Built from Four Seasons mobile A/C experience

Detailed Description

The Four Seasons 73646 HVAC mode door actuator is a replacement component for the climate control system that moves the mode door between airflow positions. When the actuator wears out or loses calibration, the system may stop directing air correctly through the dash vents, floor outlets, or defrost outlets. This replacement is specified for 1997-1999 Acura CL, 1995-1998 Honda Odyssey, and 1995-1997 Honda Accord applications.

This part cross-references Honda (e.g., 79140SV4A01) for the same application. The 73646 actuator is a practical choice for drivers searching for a 1995-1997 Honda Accord HVAC mode door actuator, a 1995-1998 Honda Odyssey air door actuator, or a 1997-1999 Acura CL climate control actuator.

Common Issues It May Solve

• Air stuck on one outlet setting, such as defrost only or floor only
• Inconsistent airflow direction from the HVAC system
• Clicking or movement issues from a failing mode door actuator
• Loss of proper vent selection on the climate control panel
• HVAC system not responding correctly to mode changes

Installation Notes and Tips

Verify the connector style, mounting ear layout, and door linkage before installation. Compare the original actuator to part number 73646 to confirm the 7-pin configuration and arm-style linkage match the vehicle’s HVAC setup. After installation, cycle the climate control through all mode positions to confirm smooth door movement and correct airflow routing.

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 HVAC mode door actuator is built for reliable service in select Acura and Honda vehicles.