Two things to check....
1. Turn fridge OFF
2. Open outside compartment door.
3. Find the black box.
4. At the bottom of the black box are two wires, a black and a white. Remove the BLACK wire for 30 seconds and plug it back in.
5. Turn the fridge back on and see if the problem is fixed...if not, see below.
1. Turn fridge OFF.
2. Open outside compartment door.
3. Find the black box.
4. Note the position of all wires going to the black box. Cell phone pic is helpful.
5. Remove wires to black box.
6. Remove 4 screws holding the cover on the black box.
7. Remove cover
8. There are two fuses inside...one is a 12VDC fuse and the other a 120VAC fuse.
9. Using a meter, check both fuses. Replace the one that's blown.
10 Reassemble in the reverse order as above..
Good luck....Dennis