Ao Smith 100108683 Upper Thermostat Eco Electric Water Heater

Product Description

The AO SMITH 100108683 is an upper thermostat with an Energy Cut-Off (ECO) safety device designed for electric water heaters. It monitors and controls the water temperature in the upper tank zone, cutting power to the heating element if a thermal runaway condition is detected. Rated for 240 volts, this thermostat features an adjustable temperature setting to meet varying hot water demand requirements. It is intended for installation by licensed plumbers or water heater service technicians working on standard residential electric storage tank water heaters.

This thermostat is designed for heating applications in residential electric water heater systems, specifically as an upper thermostat replacement. It corresponds to model WH10-A and is suitable for standard storage-tank style electric water heaters operating at 240 volts. Note: This part is not intended for use on point-of-use model water heaters. Install only in applicable full-size tank heater configurations.

Key Features

• Integrated ECO (Energy Cut-Off) safety device cuts power during overtemperature conditions
• Adjustable temperature setting for flexible hot water output control
• Rated for 240-volt electric water heater systems
• Designed as an upper thermostat for dual-element electric storage tank heaters
• Not compatible with point-of-use model water heaters

Compatibility

Designed as an OEM-style upper thermostat replacement for standard residential electric storage tank water heaters. Corresponds to AO SMITH model WH10-A. Do not install on point-of-use model water heaters.

Installation Notes

Installation should be performed by a licensed plumber or qualified water heater technician. Always disconnect electrical power at the breaker panel before accessing the thermostat compartment. Drain or isolate the tank as needed per the heater manufacturer instructions, and follow all applicable local electrical codes when making wiring connections. Do not install this thermostat on point-of-use heaters, as noted in the product warnings.

Technical Specifications

• Voltage: 240 volts
• Adjustability: Adjustable
• Application: Heating
• Model Reference: WH10-A

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100108683