The fan you want to be concerned with at high ambient temp is the aux. electric fan. That comes on by the high pressure switch at the reciever/drier. If you jump the two wires at the switch and the fan does not run, look into the fan circuit.
[ fuse, relay, etc]
If the fan circuit proves well [ when you jump the sw.], then you may be , as said, low on freon. [ not enough pressure to trip sw.]...or bad sw....
Improper air cooling of the condensor in any refrigeration system [ except water cooled] , will result in low perfomance. So will low refrigerant. Same problem, different diagnosis. Check both.