It’s something on the high voltage side (fan, auger or igniter) more than likely igniter. If you have the technical ability, make sure the smoker is unplugged. Then, using a multimeter, check both wires on the fan, auger & igniter to ground with meter set on the continuity setting. If it beeps or goes to 0, you’ve just found your direct short. Also, you can ohm out igniter. If you get an ohm reading (set meter to 200 k ohm if not auto ranging) then the igniter is probably good, if it shows OL, it is bad.
If this happens the second you plug the smoker in, it could be a bad control as well. Fan, auger or igniter should only blow fuse (if bad) if you had it calling, not when you just plug it in.