York 025-28663-001 Temperature Sensor

025-28663-001 is the original factory ambient temperature sensor (Ambient Temperature Sensor) for the air conditioning units of York (a brand under Johnson Controls). In the parts catalogue, this number is a reference number for 371-01180-223 and SEN-4910. The single-piece weight is approximately 0.02 kilograms and it belongs to the York air conditioning unit temperature sensor series. It is different from 025-29964-000 (water temperature sensor), 025-30440-000 (oil temperature sensor), 025-39721-001, 025-41875-000, 025-47669-000, and 025-47673-000, which belong to different temperature measurement stations.
This sensor is a NTC thermistor type temperature probe that operates based on the characteristic that the resistance value of the sensing element changes with temperature: The temperature sensors of similar York air conditioning units mostly use 10K Type II thermistors. The control board converts the measured resistance into a temperature value according to the factory resistance-temperature comparison table. Its function is to collect the ambient temperature around the unit in real time, providing a basis for environmental temperature compensation for the control system, participating in the logic judgment of fan start-stop, load regulation, defrosting, and high/low temperature protection, and avoiding the unit's incorrect operation or overheating in extreme environments. The probe is manufactured according to the original factory specifications, with fast temperature response, good long-term stability, resistance to humidity and heat aging, and a shell with moisture-proof and anti-interference capabilities.