Smith 100271315 Limit Switch is a critical safety component engineered for high-performance hydronic and water heating systems

Key Benefits for Technicians: OEM Compatibility: Replaces Nordyne 903422 and cross-references with part number 277622 for a direct-fit installation in M1SB and N3300 series furnaces

Can I use this for both low and medium-temperature applications

When performing a furnace repair or preventive maintenance

providing the necessary reach for mounting in various cabinet or ducting configurations

Fasco A251 Motor 319825-402 Smith 100271315 Limit Switch isWhen you're troubleshooting a failed draft inducer, the Fasco A251 Motor is a precision engineered 1 35 HP solution specifically designed for high efficiency venting applications. Operating at 208 230V, this single speed unit delivers a consistent 3000 RPM, ensuring the static pressure required to clear combustion gases from the heat exchanger. This motor is a direct OEM replacement for Skymark 7021 9136 and is frequently found in furnace and boiler