After reading the paragraph below (taken from the Allears web site), I too, was worried about the AC at POP since I prefer the Arctic Zone.
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"Without motion in the room fairly regularly, the thermostat will default to a "shut off" position. The room becomes warmer than you'd like overnight, and you won't find a nice, cool, air-conditioned room upon returning from the parks on a hot day."
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Now, here are some helpful (if not ingenious) tips I picked up from the "Talk Disney" message board:
*edited to say these comments were intended as lighthearted fun*
"Tigger2 says": "I'm getting a balloon to tie to a chair to keep the air on.."
"10 min to wdw" says: "just make sure the chair is near the air conditioner vent so while your gone the A/C system will keep it moving around."
And if you're thinking of keeping your Pop room thermostat at the lowest temperature setting (65 degrees?),
"Jeserin" says: "Nope, if you turn it all the way down you can blow a fuse and the whole thing shuts off... if you leave it about 68 it stays nice and cool.."
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Note: No one has come forth to say whether these methods kept their Pop rooms as cool as they would like them. Still, regardless of all the reassurances about the AC at Pop being just fine, my first purchase upon check in is going to be a Mickey balloon!
Keep'n cool at Pop!
Tink