Lochinvar & A.O. Smith 100157720 Adjustable High Limit, M/R

Description

Lochinvar & A.O. Smith 100157720 Adjustable High Limit with Manual Reset

The Lochinvar & A.O. Smith 100157720 is an adjustable high limit control with manual reset (M/R), engineered as a genuine OEM replacement component for compatible Lochinvar and A.O. Smith water heating equipment. This safety device monitors water or fluid temperatures and interrupts the heating circuit when temperatures exceed the set point, protecting the appliance and connected systems from potentially damaging overheating conditions.

Key Features

• Adjustable high limit set point for flexible installation and system-specific calibration
• Manual reset (M/R) operation requires deliberate technician action before resuming normal operation, adding a critical safety layer
• Genuine OEM part — direct replacement for compatible Lochinvar and A.O. Smith water heaters and boilers
• Provides reliable overheat protection to safeguard equipment, plumbing, and building occupants
• Designed for straightforward field installation by qualified HVAC/R and plumbing professionals

Application

This high limit control is intended for use in residential and light commercial water heating systems where precise temperature safety cutoff is required. The manual reset feature ensures that a qualified technician investigates and resolves the root cause of any high-temperature fault before the system is returned to service, minimizing the risk of repeated overheat events.

Product Details

• SKU: 100157720
• Brand: Lochinvar & A.O. Smith
• Type: Adjustable High Limit Control
• Reset Type: Manual Reset (M/R)
• Application: Water Heaters / Boilers