Wrong heater/AC vents blowing randomly

[First EV]

2014 model S. The wrong heater/AC vents are blowing. Sometimes the Heater/AC will blow on my feet or the windshield even though I have selected the mid vents. Switching to the floor vent will some times get the mid vents to work but very little at the floor. Changing fan speed or recirculation has no effect. Reducing the temperature seams to get the mid vents working again but not consistently. The problem will frequently resolve itself if I leave the car for half an hour or so. Seams to be happening more often. No wierd noises or warning messages. I have tried a manual shut off with no effect. Please help.

 

[First EV]

Maybe I posted in the wrong section. Will update to user interface section. Admins please delete this one.