Fridge runs warm when temperature climbs into high 80s

Proper installation in a slide is critical. Using a mirror determine how much of a space there is between the coils and outside wall... one inch max. Likely there is a dead air space above the top vent.
Still under warranty? Make them install it properly... 1’” of clearance and add a angled baffle at the top vent so there is no dead air space. Fans are a bandaid, except for a NoCold 1200.