My dealer kept my truck 2 full days. Took in the morning, kept till the following afternoon. Since they have no loaners, they gave me a ride home and picked me up the next afternoon. AC works better, now if they can just figure out the programming issue that stops the AC/HEAT from engaging on remote start from where set when off. BUT, I have to wait till they get a loaner available before I have them do, so on a holding pattern.
ADDED: manual valve: if U close all the way, U have nothing running through Heater Core so U have no "warm" air if needed to clear windows, just a saying.