Refrigerator Fan, Direction of Air Flow

[FlyboyTR]

After my fiasco with finding all the rat damage to the fridge...I have been going through everything. I am puzzled about the OEM fridge fan and the direction of air flow. Our previous 2720, the air flow was downward (sucked heat off the top and expelled it out the bottom. That seems right for me...

However, on our 3023 it is just the opposite. The fan pushes air upwards. That seems backwards since (IMO) the goal is to remove the hot air from the top and exhaust it away versus pushing cool air upwards and out the top vent and between the roof shells when closed.

So, Which direction is correct? Thanks!