The problem is there are two kinds of washer fluid summer and winter the washer tank on the smart is so large that the fluid last very long ie fill in the summer and lasts till winter when it will freeze . When frozen the firts time you hit the washers the pump can not move and the fuse blows . Best thing to do is change your washer fluid.
Glad to see this discussion on here...even if it is over 2 years later! I just had this happen today. Got in the car & the seat heaters wouldn't turn on, then neither would the AC, rear defroster, or air circulation switch for max AC. I had tried to see if I could get a few final drops of windshield washer out to clean the windshield. Don't know if that worked or not. Could've been what blew the fuse. So I'm gonna go get a fuse for #20, then refill my windshield washer & see if this fixes it. Hope so!