With a resistive rating of 25 Amps at 120V

A faulty switch typically causes the furnace to "limit out

guarding against structural tank failure and catastrophic pressure spikes

including the 27W model

it is rated for both natural and LP gas systems

York S1-025-49713-000 Transformer With a resistive rating ofThe York S1 025 49713 000 is an OEM heavy duty 75VA 24V control transformer engineered for multi tap primary applications in professional HVACR systems. This component effectively steps down 208 240v to 24v, providing stable low voltage power for contactors, control boards, and thermostats in York, Luxaire, and Coleman equipment. As the direct replacement for S1 025 25973 700, it maintains the precise electrical characteristics and mounting footprint