I bought the new service manual for $200 and skimmed the 4,488 pages. Here are a few things I found:
https://electricrevs.com/2018/06/05/rev ... ce-manual/
Owners in hot and humid areas might be pleasantly surprised to learn that there is a secret “afterblow” mode that will continue to blow air through the vehicle ducts after it is turned off in order to dry out the air conditioning system. Otherwise, the moisture left in the ducts can allow the growth of bacteria and mold that can sometimes cause odors. This mode is not documented in the owner manual but it can be enabled by a dealer service technician.