the 100074606 fan motor is a common replacement part for select commercial and high-end residential tankless water heaters and boilers

the thermostatic element may no longer be responding correctly

The Robertshaw 1980-072 Snap-Fit Thermocouple is a professional-grade 72-inch pilot sensor engineered for immediate integration into residential and commercial heating systems

When diagnosing a fan motor not spinning or hunting

Tecumseh K90-13 Overload Kit 323055-751 the 100074606 fan motor isThe Tecumseh K90 13 Overload Kit is a critical external protection component designed for specific Tecumseh reciprocating compressors. This kit functions as a thermal overload protector, monitoring both current draw and internal temperature to prevent motor winding failure during locked rotor or high head pressure conditions. Engineered for seamless integration with OEM startup components, the K90 13 ensures the compressor remains within its safe