this motor is the official superseding part for the M0023903R and matches the original electrical specs and mounting footprint

The York S1-024-35880-000 is an OEM Programmed ECM Motor designed for precision airflow control in multi-speed and variable-speed HVAC systems

allowing for precise modulation of RPM to meet specific load requirements

utilizing the same mounting profile and electrical leads for a seamless drop-in installation

Lennox 10A85 Gas Valve 30067439-890 this motor is the officialThe Lennox 10A85 is a high performance two stage natural gas valve designed for precision fuel regulation in residential and light commercial heating systems. This Honeywell VR8305Q4500 derivative features a 1 2 inch NPT inlet and outlet, facilitating a standard footprint for quick field replacements. Engineered for two stage gas furnaces, it utilizes a 24V redundant solenoid configuration to ensure reliable ignition sequences and stable manifold