Ao Smith 100209983 High Limit Switch Kit

Product Description

The AO SMITH 100209983 is a high limit switch kit designed to protect water heater systems from overheating conditions. The high limit switch monitors water temperature and interrupts the burner or heating element circuit when temperatures exceed a safe threshold, preventing thermal damage to the tank, components, and surrounding installation. This kit provides the hardware needed for a complete field replacement of a failed or suspect limit device. Licensed plumbers and water heater service technicians are the primary installers of this component.

This kit is suited for residential and light commercial water heater applications where the high limit safety circuit requires service. It is a direct replacement component intended for use during routine maintenance calls or emergency service situations where an overtemperature event has tripped or damaged the existing limit switch assembly.

Key Features

• Complete kit format includes hardware needed for full limit switch replacement
• Protects water heater from overtemperature conditions by interrupting the heating circuit
• OEM part number ensures proper fit and function for AO SMITH water heater systems
• Designed for field replacement by licensed service technicians

Compatibility

Designed as an OEM-style replacement high limit switch kit for AO SMITH water heater systems. Verify fitment against the unit model and serial number before installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified water heater service technician in accordance with local plumbing codes and the manufacturer service documentation. Before beginning work, shut off the gas supply or disconnect electrical power to the water heater and allow the unit to cool to a safe handling temperature. Drain pressure from the system as needed before removing any components. Do not restore power or fuel supply until the replacement switch is fully seated, wired, and the access panel is secured.

Technical Specifications

• Component Type: High Limit Switch Kit

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100209983