Lochinvar & A.O. Smith 100166080 Thermal Switch 322057-301 While these switches can fail

While these switches can fail due to age or vibration

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

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

and packaged HVAC systems

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 While these switches can failThe 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