York S1-025-51758-000 Harness 321702-401 this automatic switch valve is

this automatic switch valve is engineered for efficiency in low-pressure applications

Durable Soft Construction: Resists cracking and hardening in fluctuating plenum temperatures

it serves as a critical component for rooftop units

replacing a 1075 RPM motor with this 825 RPM motor will significantly reduce airflow

Verify your fan blade pitch and original motor rotation before installing to ensure proper airflow direction

York S1-025-51758-000 Harness 321702-401 this automatic switch valve isThe York S1 025 51758 000 Harness is a critical OEM replacement wiring assembly designed specifically for York air handlers utilizing Standard ECM blower motors. This HVAC blower motor harness ensures precise communication and power delivery between the integrated motor controller and the main control board, maintaining the high efficiency performance typical of AE Series air handlers. Built to withstand the constant thermal cycling and mechanical