Method to automatically manage and provide energy control and estimated energy savings for duty cycled HVAC&R equipment in an improved manner as compared to operation with hysteresis on/off thermostat control itself, wherein a time delay for control signals is determined which can provide selected energy savings and can be applied to control signals to a load unit. An electronic controller can be used as an add-on device in HVAC&R systems with thermostat control which automatically manages and provides the energy control for estimated savings for duty cycled HVAC&R equipment.