Lochinvar & A.O. Smith 100166080 Thermal Switch 322057-301 those part numbers are identical

those part numbers are identical and refer to the same Size #05 orifice assembly

What electrical connection is required

000 hours is recommended to maintain peak waste oil heater performance and prevent misfires caused by internal debris or orifice wear

Ensure all electrical power and gas supplies are disconnected before accessing the cabinet to replace the existing control and bracket assembly

Lochinvar & A.O. Smith 100166080 Thermal Switch 322057-301 those part numbers are identicalThe Lochinvar & A. O. Smith 100166080 Thermal Switch is a critical safety component designed for Residential FVIR (Flammable Vapor Ignition Resistant) gas water heaters. As a resettable thermal switch, it monitors the combustion chamber for excessive temperatures or restricted airflowcommon issues in systems with a clogged flame arrestor or inadequate makeup air. This rollout switch acts as a manual reset high limit, preventing gas flow to the burner