Fan Controls Not Working for Front Seats Only

About 2 days ago, I noticed the fan control for the front seats of my 2015 Town & 

Country stopped working. I am, however, able to control the fan for the backseat. 

The actual heater is working, as once I get the car moving, warm air does 

come out of the vents, but again, this appears to be only due to the 

momentum of the car. Any ideas on what this could be?