Description
The Lochinvar & A.O. Smith 100148403 is a 175°F high limit switch designed as a direct OEM replacement for compatible Lochinvar and A.O. Smith water heaters and boilers. High limit controls are a critical safety component in hydronic and water heating systems — they monitor water temperature and interrupt the burner circuit if the system exceeds the rated set point, preventing dangerous overheating and protecting both equipment and occupants.
Product Overview
This high limit switch is factory-set to trip at 175°F, making it well-suited for residential and light commercial water heating applications where precise temperature protection is required. Using a genuine OEM part number ensures proper fit, function, and compatibility with your existing system.
Key Features
- OEM part number 100148403 for verified compatibility
- Factory-set trip point at 175°F (79.4°C)
- Designed for Lochinvar and A.O. Smith water heaters and boilers
- Interrupts burner circuit upon reaching high-limit set point
- Critical safety component for overheat protection
- Direct drop-in replacement for simplified installation
Application
This high limit switch is intended for use in Lochinvar and A.O. Smith water heating and hydronic boiler systems. Always verify compatibility with your specific model before installation. Consult the equipment service manual for proper wiring, mounting, and reset procedures.
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