On my 2019 Southwind 35K, is there any way to individually shut off the air flow through the passenger air vents.  I see you can turn them sideways but that doesn't stop the airflow fully.  This is turning into a major issue as even on low the fan is noisy, don't appear to get any air if fan turned off, heater valve is junk, going to replace.  Passenger is complaining them don't want cold/hot air coming at them at all.  I know this is likely a Ford issue but seems pretty basic to have more control over heating/cooling.

End of rant!