prostar blower motor quit

[Brock]

08 Prostar. on my screen it says the front hvac is stuck or in wrong position. it has said that since October and I just couldn't use the 2 highest settings but now it crapped out. Of course on a day that it's pouring rain for 3 days, cold ass ice out and I was rolling in the mud fixing my truck. ...... Murphys law.

I'm getting ready to open the dash up and thought I'd ask. in your experience with these, what tends to fail?