A control system for use with refrigeration devices utilizes a refrigeration evaporator fan speed controller, at least one remote current sensor, temperature sensor, or compressor mechanical/electrical contact sensor, and a sensing relay to determine when the compressor in a refrigeration system is operating. When the current, temperature, or electrical contact sensor detects that the compressor is not operating, the refrigeration evaporator fan speed is reduced to run at a lower speed than when the compressor is operating.