I'll keep an eye on the duct tape joints then, thanks for the tip. They seem to be holding well so far, maybe the metal tape is helping.
Got home and the temp in the carboy was 48.
I wired up a small fan to a wall wart last night and let it run in there for an hour. That brought the temp in the carboy down to 46. I also found the controls for the the fridge temp, they are way in the back at the top left. I pointed the fan at the control so it wouldn't have any stagnant cold air around it causing it to turn off.
I was a little worried about running a 160mA fan with a 100mA wall wart so i didn't leave it running overnight. But this morning the temp in the carboy is 40. So 48 hours for the water in the carboy to go from 55 to 40. Keep in mind the fridge was not running prior to adding the carboy, so i think it works pretty well for what it is.
And hey, i may get to do a lager yet!!!