Switch cleanly between fresh outside air and recirculated cabin air with the Four Seasons HVAC Recirculation Door Actuator 73699. This small electric actuator drives the recirculation door inside the HVAC case, positioning it to draw in outside air or recirculate cabin air on command from the climate controls. It installs as a direct-fit replacement for the 2018-2025 Freightliner Cascadia (see the "Vehicles it fits" section for the full application details).
When a recirculation door actuator fails, you may notice the mode won't change, a clicking or knocking behind the dash, or the door stuck in one position. If a failed actuator is the cause, this unit replaces it.
- Complete with linkage: Includes lever arm, gear, cam gear, hardware, and linkage as applicable.
- Quality internals: Built with an internal motor, drive gears, electronics, and connections.
- Tested: Checked for function, durability, and longevity, and built to OE-level fit and function.
- Four Seasons backing: Supported by decades of mobile A/C experience.
Interchange: ACT2048IM · BDAA1425 · 921509 · BOAFK466001 · FK466001 · DA1637
This part cross-references / interchanges with the following part numbers:
ACT2048IM, 73699, BDAA1425, 921509, BOAFK466001, FK466001, DA1637
Frequently Asked Questions
What does the Four Seasons 73699 actuator do?
It's an HVAC recirculation door actuator — a small electric motor that positions the recirculation door in the HVAC case to switch between drawing fresh outside air and recirculating cabin air.
Which vehicles does the 73699 fit?
It's a direct-fit replacement for the 2018-2025 Freightliner Cascadia. Check the "Vehicles it fits" section to confirm the fit for your specific vehicle.
What are the signs this actuator may need replacing?
Common signs include the recirculation/fresh-air mode not changing, a clicking or knocking noise behind the dash, or the door stuck in one position. Diagnose the cause before replacing.
What's included with the 73699?
It includes the lever arm, gear, cam gear, hardware, and linkage as applicable, along with the internal motor, drive gears, electronics, and connections.
What interchange numbers does the 73699 replace?
It cross-references ACT2048IM, BDAA1425, 921509, BOAFK466001, FK466001, and DA1637. Match your original part number to confirm.
