this blade features a standard 1/2-inch bore

which typically indicates a limit circuit lockout caused by restricted airflow or a failed thermal sensor

Genuine York S1-025-37390-000 replacement for exact fit and function

ensuring the inducer motor establishes proper static pressure before allowing the ignition sequence to proceed

OEM Reliability: Genuine Trane furnace part ensures exact calibration and mounting alignment

Advanced Distributor Products 110000245 Limit Switch 320788-703 this blade features a standardThe Advanced Distributor Products 110000245 Limit Switch is a high precision safety component engineered for HVAC equipment, specifically B, CP, F, MX, and S series air handlers. This 80 140F AUTO Limit Switch operates as a critical temperature control, automatically interrupting the electrical circuit if domestic heating or cooling temperatures exceed the 140F threshold. By monitoring these thermal operational limits, the ADP 110000245 prevents heat