Originally Posted by osugasman

I also need the "highly prone to failure after 16 years" mixer valve motor--passenger's side. While troubleshooting it, I noticed that the ?pin? that connects the vacuum motor to the articulating arm on the recirculation intake structure had "disappeared". Pump fully functional. Fixed it by convincing a zip tie to crawl in there and offer up his one and only shot at fame by being utilized in a Porsche. Now fully functional. While awaiting the mixer motor, I simply closed the flap valve (tested it with heater on high--no movement towards opening) and have deliciously cold a/c just in time for the >100 degree Cincinnati weather this week.