The cut-in pressure allows a compressor to start running, and the cut-out pressure is set to turn off the compressor. However, before going to the main discussion, you need to know what cut in and cut out pressure is. This is a guideline for air compressor pressure switch adjustment, and undoubtedly, it is the easiest way. By adjusting the cut-in and cut-out pressure, a pressure switch allows the air compressor to do so. Air Compressor Pressure Switch Adjustmentīecause of the air compressor pressure switch, an air compressor gets switched on and off automatically.