Lochinvar & A.O. Smith 100208174 High Limit Switch Manual Reset 5′ Cap

Description

Lochinvar & A.O. Smith 100208174 High Limit Switch — Manual Reset with 5′ Capillary

The Lochinvar & A.O. Smith 100208174 is an OEM high limit switch designed to provide reliable overheat protection for compatible boilers and water heaters. Featuring a manual reset mechanism and a 5-foot capillary sensing element, this limit switch monitors system temperatures and interrupts operation when unsafe conditions are detected — helping to prevent equipment damage and ensuring safe, code-compliant performance.

Key Features

• Manual reset operation for added safety — requires deliberate technician action before restarting
• 5-foot capillary bulb for flexible sensing placement within the system
• OEM replacement part for Lochinvar and A.O. Smith boiler and water heater applications
• Interrupts burner or heating circuit on high-temperature excursion
• Designed for dependable, long-service-life performance in demanding hydronic and water heating systems

Application

This high limit switch is a direct OEM replacement for select Lochinvar and A.O. Smith boilers and commercial water heaters. It is intended for use by qualified HVAC and plumbing technicians performing service, maintenance, or system repair. Always consult the equipment’s service manual to confirm compatibility before installation.

Product Specifications

• SKU: 100208174
• Brand: Lochinvar & A.O. Smith
• Type: High Limit Switch
• Reset Type: Manual Reset
• Capillary Length: 5 Feet