Re: Heater quit... sort of
The 'screw' is actually a nut, accessed from the front of the panel. Pull off the center knob/dial while sitting in the driver's seat. Behind this knob is a nut that holds the shaft into place. I used a 12mm socket, but the fit wasn't perfect, although it did work. After tightening, apply Lock-Tite or nail polish to disallow the nut from working loose again. The loose nut allows the small shaft module to vibrate sufficiently to break off the wires connecting it to the circuit board.
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