No defroster where is the actuator?

Tiny
HORSESAS
  • MEMBER
  • 2016 LINCOLN MKS
  • 3.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 127,000 MILES
The actuator by the fan only controls the fresh air where is the actuator that blends the defrost mid then and floor heat I have only middle vent only no floor heat no defrost
Friday, January 9th, 2026 AT 10:10 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,475 POSTS
Yep, it sounds like the mode blend door actuator is out which is common, it is located above the accelerator pedal, it might be a little tough to get to but if you use 1/4 drive tools with an universal and stick with it you can get it replaced. Once completed do this to recalibrated the actuators.

Remove Smart Junction Box (SJB) fuse 15 for at least one minute.

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Saturday, January 10th, 2026 AT 9:40 AM

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