I had this exact same thing happen and there is very little info for the digital control since they rarely fail.
SO, its the blower motor resistor. You can buy it from the dealer, for a crap load of money, or you can buy it from the autoparts store. I will tell you this, the replacement part looks NOTHING like the "stock". When you take the stock piece out, its a 4 wire deal with a bunch of fins on it. The replacement part has like 1 or 2 fins, and 2 wires. There is a diagram that explains how you need to cut the stock plug off and rewire it. It only takes a few minutes to do this, and then you will have blower control.