Complete Assembly: Contains the gas valve spring

This kit simplifies field repairs by providing a factory-spec stationary seat and rotating seal assembly

Each assembly is manufactured to strict factory tolerances to provide smooth mechanical operation and long-term durability in high-cycle environments

OEM Compatibility: Exact replacement for Nordyne 918737 and MAH-1056B

the bellows and internal components are compatible with all non-corrosive refrigerants

Trane SWT1744 Limit 321894-709 Complete Assembly: Contains the gasThe Trane SWT1744 High Limit Switch is a critical safety component designed for industrial HVAC systems and heavy duty gas furnace applications. This OEM replacement part serves as a thermal safeguard, featuring a fixed 190F temperature limit to prevent equipment overheating and potential heat exchanger damage. Unlike standard limit discs, the SWT1744 includes an integrated fan time delay mechanism, ensuring the blower motor continues to circulate air