Car won't blow air from the 2 front AC vents (2003 RX300)

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Hey guys, there's some scorching heat right now and this annoying problem recently popped up. It just won't blow any air from the 2 front AC vents. I have no clue what the problem is, and upon finding out, I'd love to know if it's self repairable. My guesses thus far are: actuator problems, filter is dirty. I'd appreciate any help I can get with this asap, the car gets insanely hot due to only the side vents and the front vent ( defroster? one by the windshield ) working.

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The most likely culprit is the Air Mix Servo.

The above link provides some discussion but there is lots of discussion available on this subject.  It's a common failure point for this generation of RX300 vehicles.

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