That's the multifunction box controls your fan, a/c, f/p and lots of other stuff.
So if the fan control function took a dump you'll need to replace the entire box. Check and make sure that the 40 amp(I think) fuse located in the distribution box under the hood is not blown. I've even seen some come with a circuit breaker instead of a fuse. If the breaker fails, no fan and trouble codes are not to far behind.