R43107-001

Common Questions Is the S1-025-41239-000 compatible with older York air handlers

specifically optimized for Marvair wall-mount units and industrial HVAC systems

you need a 3-pole contactor that can stand up to high-amperage demands without premature pitting or coil failure

a full flame sensor replacement is necessary to prevent repeated system lockouts

Lochinvar & A.O. Smith 100148403 Limit Switch 328140-751 R43107-001The Lochinvar & A. O. Smith 100148403 Limit Switch is a critical OEM replacement part designed for high limit temperature protection in commercial water heaters, boilers, and pool heaters. This 175 degree high limit assembly monitors the heat exchanger or outlet water temperature, providing an essential safety cutoff to prevent thermal runaway and equipment damage. Engineered for HVAC systems requiring precise thermal regulation, the 100148403 ensures