For the M611 series

Is the B1399501 bearing interchangeable with other brands

As a critical draft inducer assembly component

Direct OEM part 100271839 ensures a match for voltage

it can safely be used in systems requiring 370V

Lennox 71W44 Limit Switch 319825-402 For the M611 seriesThe Lennox 71W44 Limit Switch is a critical OEM safety component engineered for precise thermal regulation in residential gas furnaces and air handlers. This L145 30F limit switch is designed to monitor discharge air temperatures, automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145F safety threshold. Once the system cools to 115F, the switch features an automatic reset function to restore operation without