Trane SHE5346 Sheave 321142-301 a different part number is

a different part number is required to ensure proper gas flow rates

The S1-025-31813-000 ensures that if the system experiences restricted airflow—often due to a clogged filter or a failing secondary heat exchanger—the circuit breaks before the unit sustains damage

This can lead to insufficient cooling or motor overheating due to increased or decreased static resistance

Whether you are troubleshooting Carrier error codes like EC53 or F1 or performing a preventative HVAC sensor replacement

Trane SHE5346 Sheave 321142-301 a different part number isThe Trane SHE5346 Sheave is a heavy duty, single groove BK90H Sheave engineered for precision power transmission in commercial air handlers and ventilation systems. Constructed from close grain cast iron, this fixed pitch component features a combination groove design optimized for 4L, A, 5L, and B section V belts. This bushed type pulley requires an H series split taper bushing for secure shaft mounting, accommodating bore sizes ranging from 0. 38 to