Found it (Thanks to Dave/180 listing all these). Since I could not find it, I downloaded it again. It is attached, and references the member CL770(?). One reason I could not find it (maybe) was the listing as 'Heater/AC Speed Control Repair'. Given the number of pins, and the systemic problems with these heads, I think this 'fix' would correct this specific problem (and most of the) annoying intermittent A/C problems. Good luck with the fix, if you do it. Post back your findings/results? Hope your Christmas is fun, safe, and happy for all!