Hi,
I'll do a few tests but so far I was using manual fan settings (not Auto mode), both sides set to 32 (max setting), center dials set to red dots and it didn't seem to matter whether it was set to Hi-speed defrost, regular defrost, face vents, feet or a blend thereof. When I have the fan set to half or a bit higher, I get hot air. When I set the fan to maximum or close to it, I get cool air.
Thanks for any help that you can provide.