Mike is correct. There is a door switch (like a refrigerator light switch that is used to turn off the A/C (one the newer ships).
Having a bunch of cabins with the doors open all night can really mess with the ships A/C system balance. So they decided to have it shut off. IF you can stand to have the door open, why would you need A/C? Having it open is going to over power any cooling the A/C could do in my book.
And for Spiritfilled- If she was afraid of Seamonsters (which is a hoot) why did she let you book a Balcony?
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013