Fuses tend to be 12 volt. the plug and outlet in the outside fridge compartment are 120 volt and protected by a breaker... The label in the fuse box says the largest fuse in the box should be 30 amps but I see 2 40's.. I'm not sure what the blown fuse is for since I do not know it's number and can't see the entire label.
Your symptoms suggest a short in the wire to the fridge, on the fridge control board or in the fridge... IF the fuse to the fridge is larger than 20 or 30 amps it suggests the fridge is a triple power (AC/DC/Propane) and switch it OFF DC, Use only propane or AC, see if that "fixes" it, The 12 volt heat element is my #1 suspect on a 3-way fridge. Control board #2 and #1 on a 2 way.
Or fans and the interior light.