Four Seasons 73175 HVAC Mode Door Actuator

Four Seasons 73175 Air Door Actuator

Four Seasons 73175 is an HVAC mode door actuator built for precise air door control in the climate system. It uses a cam-style door linkage, a 7-terminal pin layout, and a 4-ear mounting design for applications that require this specific actuator configuration.

Compatible With 2003-2004 Cadillac CTS and 2004-2005 Cadillac SRX applications listed below, this Four Seasons Air Door Actuator supports proper airflow direction inside the HVAC case. The Four Seasons Air Door Actuator line is focused on replacement components for heating and air conditioning control functions.

Key Features

• Part number 73175 for direct identification
• HVAC mode door actuator design
• Cam door linkage style
• 4 mounting ears for secure installation
• 7 terminal pins for the specified electrical connection
• Built for air door positioning within the HVAC system

Detailed Description

This actuator is used to move the HVAC mode door so the system can route air to the selected vents. When the original unit wears out or loses calibration, the result can be inconsistent airflow control, incorrect vent selection, or a door that no longer responds properly to the climate controls. Four Seasons 73175 is specified for 2003-2004 Cadillac CTS and 2004-2005 Cadillac SRX applications, including the VIN break notes listed for 2005 models.

This part cross-references A60175 and 604163 for the same application.

What It Helps Fix

• Airflow stuck at one vent position
• HVAC controls that do not change mode correctly
• Inconsistent defrost, panel, or floor air routing
• Noise or binding from a worn mode door actuator
• Loss of response from the climate control system

Installation Notes and Tips

Verify the connector style, 7-terminal pin layout, cam linkage, and 4-ear mounting pattern before installation. For 2005 Cadillac CTS and 2005 Cadillac SRX, confirm the VIN break points listed in the fitment data before ordering. Match the existing actuator location and inspect the HVAC door movement for binding before replacing the unit.

Quality Assurance

Four Seasons supplies HVAC replacement parts for vehicle climate control systems, and this actuator is cataloged to the specified OE-style application data for the listed Cadillac models.

Fitment

• Fits 2003-2004 Cadillac CTS, N/A
• Fits 2004 Cadillac SRX, N/A
• Fits 2005 Cadillac CTS, N/A; to VIN No. 50155651
• Fits 2005 Cadillac SRX, N/A; to VIN No. 50155499