Lochinvar & A.O. Smith 100166080 Thermal Switch 322057-301 Versatile Compatibility: Fits standard Johnson

Versatile Compatibility: Fits standard Johnson Controls pneumatic setups with 1/8" NPT barbed fittings for easy field installation

What electrical connection is required

and packaged HVAC systems

This high-limit safety control is a direct drop-in replacement for failed or drifting thermal switches in residential and light commercial HVAC equipment

While these switches can fail due to age or vibration

Lochinvar & A.O. Smith 100166080 Thermal Switch 322057-301 Versatile Compatibility: Fits standard JohnsonThe 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