Lochinvar & A.O. Smith 100208241 Reset Switch

The Lochinvar & A.O. Smith 100208241 Manual Reset Switch is a critical OEM safety component designed for high-efficiency hydronic boilers and commercial water heaters. This high-limit manual reset switch, which is the direct replacement for part SWT2004, monitors internal temperatures and provides a hardware-level safety lockout to prevent equipment damage in the event of a thermal overrun. As a genuine Lochinvar replacement part, it ensures precise calibration with the factory control board, maintaining the integrity of the combustion safety circuit.

For technicians servicing A.O. Smith water heaters or Lochinvar Knight and Armor series units, this switch is the standard for HVAC safety controls. It requires a manual physical intervention to reset after a trip, forcing a diagnostic check of the system's thermal state. Utilizing boiler replacement parts that meet exact manufacturer specifications is essential for maintaining the UL listing and operational safety of pressurized vessels. This 100208241 reset switch offers a direct-fit solution for field service, ensuring consistent performance in both residential and commercial applications.

• Direct OEM Compatibility: Seamlessly replaces SWT2004, eliminating the need for mounting modifications or wiring adjustments.
• Enhanced System Protection: provides a manual reset switch mechanism that prevents automatic cycling after a dangerous high-temperature event.
• Broad Application: Engineered for use in Lochinvar boilers and A.O. Smith water heaters, reducing truck stock requirements for multiple brands.
• Robust Construction: Built to withstand the high ambient temperatures common in sealed combustion chambers.
• Safety Compliance: Ensures the system operates within engineered thermal parameters to prevent heat exchanger failure.

Is the 100208241 a direct replacement for the SWT2004?
Yes, the 100208241 is the current manufacturer-spec part number and is identical in form, fit, and function to the older SWT2004 legacy part number.

How do I troubleshoot a Lochinvar manual reset switch trip?
A trip usually indicates a high-limit temperature condition. Before resetting, technicians should check for scale buildup, pump failure, or a faulty thermistor that may be causing the excessive heat condition.

Where is this switch typically located in the assembly?
This component is generally mounted on the heat exchanger or the supply outlet piping to monitor the maximum water temperature before it exits the vessel.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.