The Johnson Controls P70AA-118 is a high-performance condenser fan cycling control that regulates the operation of condenser fans in HVAC systems. With a pressure range of 100 to 400 PSI and a switch action that opens on low pressure, it offers fine control to prevent compressor overheating and save energy. https://www.partshnc.com/p70aa-118-johnson-controls-100400-36-capspst-open-low