Thanks Joetom.
I probably should add a little more detail, so you know where I'm headed. A question was asked on another forum "What would happen if both packs were in Stby C?"
To know this, I would need to know if the Zone Temp Control system was completely shut off or frozen in the last position prior to the packs being selected to Stby C... or even still operating as best it could with the pack forced into cold mode.
Rgds.
NSEU.