Lochinvar & A.O. Smith 100109846 Limit Switch 319825-402 particularly in hard water conditions

particularly in hard water conditions where standard copper elements typically fail

it should be protected from direct weather exposure and dripping water to ensure optimal mechanical movement

The assembly mounts via a 2-1/4" square flat pad using #10 machine screws from the underside

ensuring the structural integrity of the combustion chamber

OEM Precision: Direct replacement for Daikin-McQuay 107193101

Lochinvar & A.O. Smith 100109846 Limit Switch 319825-402 particularly in hard water conditionsThe Lochinvar & A. O. Smith 100109846 is a 90 150F M R limit switch engineered for high precision thermal protection in residential and commercial water heating systems. As a critical safety component, this manual reset thermostat monitors air or water temperature to prevent overheating conditions that can lead to equipment failure or hazardous operation. It is specifically designed for cross brand compatibility, serving as a direct replacement part