Ao Smith 100108951 Upper Thermostat with Eco Cover

Product Description

The AO SMITH 100108951 is an upper thermostat with ECO cover designed for residential electric water heater service. The thermostat monitors and regulates the upper heating element by sensing water temperature and cycling the element on or off to maintain the set point. The integrated ECO (energy cut-off) cover provides a layer of protection by housing the high-limit safety function alongside the thermostat. Licensed plumbers and HVAC technicians install this component during routine thermostat replacement or when diagnosing a no-hot-water condition traced to the upper thermostat circuit.

This thermostat is intended for use in standard tank-style electric water heaters in residential heating applications. It corresponds to model WH10C-6 and is suited for whole-house storage-tank units. Important: this part is not approved for use on point-of-use model water heaters. Attempting to install it in a point-of-use application is an unsafe configuration and should be avoided.

Key Features

• Upper thermostat position controls the top heating element in a dual-element electric water heater
• Integrated ECO cover houses the high-limit safety cut-off function
• Direct OEM-style replacement for model WH10C-6 equipped units
• Not rated for point-of-use water heater installations

Compatibility

Designed as an OEM-style replacement upper thermostat for AO SMITH electric storage-tank water heaters, corresponding to model WH10C-6. Not compatible with point-of-use model water heaters.

Installation Notes

Installation should be performed by a licensed plumber or qualified service technician. Before beginning work, disconnect electrical power to the water heater at the breaker panel and verify power is off with a non-contact voltage tester. Drain pressure from the tank if required by your service procedure, and allow heating elements to cool before handling internal components. Work should comply with applicable local plumbing and electrical codes.

Technical Specifications

• Application: Heating
• Compatible Model: WH10C-6
• Component Position: Upper

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100108951