Four Seasons 73717 HVAC Blend Door Actuator - Main

HVAC Blend Door Actuator for Lexus Main Air Door Control

Restore proper cabin temperature control with this Four Seasons HVAC blend door actuator, part number 73717. It is built for the main air door position and is a direct-fit replacement for select Lexus models, including IS300, IS350, IS500, RC F, RC300, RC350, GS350, and GS300 applications.

Key Features

• Four Seasons HVAC air door actuator for blend door control
• Female door linkage for the specified HVAC door connection
• 2 mounting ears for secure installation
• 5-terminal pin electrical connection
• Engineered and tested for dependable HVAC operation
• Part number 73717 for easy identification

Detailed Description

The Four Seasons 73717 HVAC blend door actuator controls the movement of the air door inside the climate system, helping regulate airflow and temperature distribution. This actuator is used in the main position on select Lexus vehicles and is a practical replacement when the original unit no longer responds correctly or the cabin temperature will not change as commanded. Four Seasons backs this part with more than 50 years of mobile A/C experience and focuses on OE-style fit and function for long-term service.

Compatible With select Lexus applications, including 2023-2024 Lexus IS300, Main; 2023-2024 Lexus IS350, Main; 2022-2024 Lexus IS500, Main; 2023-2024 Lexus RC F, Main; 2023-2024 Lexus RC300, Main; 2023-2024 Lexus RC350, Main; 2014-2020 Lexus GS350, No. 2; and 2019 Lexus GS300, No. 7. This part cross-references 8710630610 and ACT2067IM for the same application.

What It Helps Fix

• Temperature stuck on hot or cold
• Airflow not changing between vents and settings
• Clicking or ticking noises from the dash HVAC area
• Blend door movement errors caused by a failed actuator
• Uneven cabin comfort in Lexus climate control systems

Installation Notes and Tips

Verify the connector style, door linkage, mounting ear layout, and position before installation. This actuator uses a 5-pin terminal layout and a female linkage connection, so matching the original unit is important for proper operation. After installation, cycle the ignition and HVAC controls so the system can relearn door position if required by the vehicle.

Quality Assurance

Four Seasons engineers and tests this HVAC actuator for reliable operation and consistent fit. The brand’s mobile A/C background supports replacement parts built for service life and correct climate-control performance.