Built with professional-grade split-bobbin construction

as these issues cause heat builds-up that exceed the 105°F threshold

thermal-conductive connection to the pipe surface for precise temperature sensing

Isolated Coil Design: The isolated coil and case prevent grounding issues and electrical noise in sensitive control circuits

The York S1-025-41274-000 Temperature Sensor is a high-precision thermistor designed for critical thermal monitoring within commercial and industrial HVAC systems

Nordyne 620825R Transformer Built with professional-grade split-bobbin constructionWhen you're out in the field and find a dead control circuit, the Nordyne 620825R Transformer is the reliable official OEM replacement you need to get the system back online. This 115v to 24v HVAC transformer is a critical component for stepping down line voltage to power 24V thermostats, gas valves, and integrated furnace control boards. Rated at 20VA, it provides the necessary current for standard residential applications. The 620825R is the direct