Found on another site: The passenger air discharge temp sensor is located in the center plenum. To get to it you need to remove the passenger footwell trim piece which is held in place with two plastic push rivets. Then remove the one 8mm (IIRC) bolt to drop the floor vent. With that removed, stick your head under the dash and look to the center plenum area behind the radio and HVAC controls. The temp sensor will be an off-white color rectangular piece (all that's visible) with a two wire connector plugged in to the top of it. With a small, long flat pocket screwdriver, unplug the wiring then pry the side nearest the radio/HVAC controls away from the plenum. It will pop out slightly, at which time you can reach in and wiggle the sensor out usings a side-to-side motion. Do not twist/rotate the sensor.
There will be two more sensors just like it on the driver's side mounted in the plenum. Access and remove them in a similar fashion.