Sorry, I misread yout post, please disregard my original post.
Not knowing which Maxxair fan you have makes it difficult to help you, from what I have learned about the Maxxair fans, you have switches to control the fan's functions. Follow their instructions for operation, you may find you inadvertinly pushed a control buttonn and turned the fan off.
More info would help.
I think you need to take thr garnish off and find out where your fan is losing power. You have power to the open/close motor so you know the wallswitch is working, now you need to see where power is lost or the possibility that the fan motor has died.
You didn't say if the fan will rotate manually or not. The blade could have been forced into the housing and just needs to be adjusted for clearance.
You can try FantasticVent and see if they have any suggestion. I have heard that the customer service is not as fantastic as it was before it was sold but worth a try.