A combine (10) including a cutting wheel for harvesting crop, a separating system (24) for threshing the harvested crop to separate grain from residue, at least one of a yield monitor (115) or a loss monitor (113), a crop cleaning system (26) including a cleaning fan (52), and a controller (310) coupled to the at least one of the yield monitor (115) or the loss monitor (113). The controller (310) controls the crop cleaning system (26), and is configured to determine at least one of a throughput from the yield monitor (115), or a loss from the loss monitor (113), compare the determined throughput or loss to a respective throughput threshold or loss threshold, and control a speed of the cleaning fan (52) based on the throughput or loss comparison.
