S1-025-47304-000 York DEFROST THERMISTOR TEMP SENSOR

OEM Coil‑Temperature Sensor for York / Coleman / Luxaire Heat Pumps

The S1‑025‑47304‑000 is the OEM defrost thermistor used in York‑family heat pump outdoor units. This sensor monitors the outdoor coil temperature and feeds that data to the defrost control board, allowing the system to correctly initiate and terminate defrost cycles.

This OEM thermistor is mounted on the outdoor coil and provides temperature feedback to the defrost control board. When the coil temperature drops low enough to indicate frost accumulation, the board uses this sensor’s input to:

• Trigger a defrost cycle

• Control defrost duration

• Protect the compressor

• Restore proper airflow and heating performance

A failing thermistor may cause:

• Unit stuck in defrost

• No defrost / coil icing

• Poor heating performance

• Intermittent outdoor‑unit operation

This sensor is a direct‑fit replacement for systems using the S1‑025‑47304‑000 style thermistor.

📐 Key Features

• OEM York/Coleman/Luxaire defrost thermistor

• Provides accurate coil‑temperature feedback

• Ensures proper defrost initiation and termination

• Direct replacement for factory sensor

• Compact, durable, sealed design

• Required for correct heat‑pump winter operation