Description
The Lochinvar & A.O. Smith 100208173 is an OEM replacement 200°F auto-reset carbon monoxide (CO) limit switch engineered to provide dependable high-temperature safety protection in Lochinvar and A.O. Smith water heaters and boilers. Designed as a direct factory replacement, this limit switch monitors flue gas or combustion air temperatures and automatically resets once safe operating conditions are restored, minimizing downtime and service calls.
Key Features
- 200°F (93°C) auto-reset limit switch for high-temperature cutoff protection
- CO (carbon monoxide) limit switch for combustion safety monitoring
- Automatic reset operation — restores function once temperature drops below set point
- OEM direct replacement for Lochinvar and A.O. Smith equipment
- Engineered for reliable, long-service-life performance in demanding heating applications
Application
This limit switch is designed for use in Lochinvar and A.O. Smith water heaters and boiler systems where combustion safety and high-limit temperature protection are required. Always verify compatibility with your specific model prior to installation.
Specifications
- Part Number: 100208173
- Set Point: 200°F
- Reset Type: Automatic (CO AUTO)
- Brand: Lochinvar & A.O. Smith
- Application: Water Heaters / Boilers







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