2013 Nissan NV2500, my A/C blower keeps blowing a fuse, I'd like to know what could be the cause of it?

Blown fuses in any circuit occur due to a system overload or a shorted wiring or compromised component. The motor itself, wiring, controls, relays and power transistor all need to be checked - following the circuit that is blowing the fuse. Only hands on testing can be helpful. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops