Ride it out until spring then get rid of it. I personally know 4 people who have had the misfortune of owning a Journey. They are JUNK JUNK JUNK.

If it makes you feel any better, a guy I work with was quoted 1k yesterday by the local dodge dealer to change the alternator in his caliber. He looked it on online and his options are to either go from the top and remove the power steering pump, undo a motor mount and push the engine back or go from the bottom, remove the shields and covers, remove the a/c compressor and wiggle it out. Another brilliant piece of chrysler engineering.

2 minutes of searching shows this is a common problem with these journeys. Sounds like either one of the electric blend door motor actuators is bad or the plastic shaft the actuator rotates has snapped.