Dorman - OE Solutions HVAC Blend Door Actuator 604-991
Dorman - OE Solutions HVAC Blend Door Actuator 604-991

Dorman - OE Solutions HVAC Blend Door Actuator P/N:604-991

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$53.99
MPN: 604-991
UPC: 194883458178
Item Package Quantity: 1
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Dorman - OE Solutions HVAC Blend Door Actuator P/N:604-991
Dorman - OE Solutions HVAC Blend Door Actuator P/N:604-991
$53.99

Keep cabin temperature and airflow under command with the DORMAN blend door actuator 604-991, a direct-replacement HVAC air door / blend door actuator that positions the door inside the heater-and-A/C case. It fits a wide list of applications, from the 2006-2012 Ford Fusion, 2007-2012 Lincoln MKZ and 2006-2011 Mercury Milan to GM trucks like the 1988-1994 Chevrolet and GMC C1500/K1500, the 1998-2003 Mercedes-Benz ML320, and Volvo VNL, VHD and VAH heavy trucks — see the Buyer's Guide tab for the full 63-application list.

  • Motor-driven positioning: Drives the blend/air door in the HVAC case; a worn original can show up as clicking or tapping behind the dash and inconsistent temperature or vent airflow — if the actuator is the cause, this replaces it.
  • Frustration-free captive screws: Stay in place while you line the actuator up inside the HVAC case, making that usually awkward part of the job easier.
  • Consolidated design: Part of a precision-engineered Dorman actuator family that covers many original applications to cut ordering confusion.
  • Multiple positions: This actuator covers positions including MAIN, AUXILIARY, RIGHT MAIN, UPPER AUXILIARY and LEFT MAIN — check the fitment details, application notes and position before ordering.

Frequently Asked Questions

What does the DORMAN 604-991 blend door actuator do?

It is a small motor that moves the blend/air door in the HVAC case to control cabin temperature and airflow direction. This unit is a direct replacement for the original actuator.

What are signs my blend door actuator may need replacing?

Common signs include a clicking or tapping noise behind the dash, air that won't change temperature, or air coming from the wrong vents. Diagnose the cause before replacing.

Does this fit my vehicle?

It covers 63 applications across GMC, Chevrolet, Cadillac, Ford, Lincoln, Mercury, Oldsmobile, Buick, Mercedes-Benz and Volvo. Check the Buyer's Guide tab and confirm the correct position for your vehicle.

Will this work on a Ford Fusion?

Yes. The listed applications include the 2006-2012 Ford Fusion. Verify the year and position for your specific vehicle in the fitment details before ordering.

What makes installation easier on this actuator?

It features frustration-free captive screws that stay in place while you line the actuator up inside the HVAC case, making that usually tricky step of the job easier.

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