Johnson Controls P100AP 2 Pressure Control The York S1 031 01232 700 Temperature Sensor The York S1 031 01232 700 Temperature Sensor is a precision 10k ohm thermistor designed for high accuracy thermal feedback in residential and light commercial York HVAC equipment this 2 wire harness is designed to facilitate the connection for ignitor and sensor leads in systems utilizing a single rod or separate probe configuration This control is typically utilized as a low pressure safety cutout to protect compressors during loss of charge or as a head pressure control for fan cycling in low ambient conditions The Johnson Controls P100AP 2 is a professional grade encapsulated pressure control engineered for direct mount installation in high demand refrigeration and air conditioning environments