Description
Lochinvar & A.O. Smith 230°F Manual Reset High Limit Kit
The Lochinvar & A.O. Smith 100157743 is a genuine OEM 230°F Manual Reset (M/R) High Limit Kit designed to protect commercial and residential water heating equipment from dangerous overtemperature conditions. When water temperature reaches the 230°F threshold, the high limit device trips and requires a manual reset, ensuring the system cannot restart automatically until a qualified technician has inspected and resolved the root cause — a critical safety feature for reliable, code-compliant operation.
Key Features
- Genuine OEM replacement kit from Lochinvar & A.O. Smith
- 230°F (110°C) trip temperature for precise overtemperature protection
- Manual reset (M/R) design requires intentional technician intervention before restart
- Prevents equipment damage and potential hazards caused by runaway temperatures
- Direct OEM fit for compatible Lochinvar and A.O. Smith water heater models
- Supports safe, reliable, and code-compliant water heating system operation
Application
This high limit kit is intended as a direct OEM replacement for compatible Lochinvar and A.O. Smith water heaters and boilers. Always verify compatibility with your specific model number before installation. Installation should be performed by a licensed HVAC or plumbing professional in accordance with local codes and the manufacturer’s service documentation.
Why Choose Genuine OEM Parts?
Using genuine Lochinvar & A.O. Smith replacement components ensures proper fit, reliable performance, and maintains your equipment’s warranty. Aftermarket substitutes may not meet the original design specifications, potentially compromising safety and system longevity.







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