Ao Smith 100112327 Thermopile

Product Description

The AO SMITH 100112327 is a thermopile assembly designed for use in water heater systems where a self-powered, millivolt-based control circuit is required. A thermopile generates a small DC voltage by converting heat from the pilot flame into electrical energy, supplying the millivolt signal needed to hold the main gas valve open during normal operation. This component is installed by licensed plumbers and HVAC technicians servicing residential and light commercial water heaters.

The 100112327 thermopile is suited for millivolt gas control systems found in natural gas and liquid propane water heaters. It serves as a direct service replacement in units that rely on a standing pilot ignition system rather than electronic ignition. Technicians replace this component when millivolt output has degraded below the threshold required to keep the gas valve energized, resulting in pilot outage or no-heat conditions.

Key Features

• Converts pilot flame heat into a millivolt DC signal to power the gas valve control circuit
• Designed for standing pilot ignition systems in gas-fired water heaters
• OEM-style replacement for reliable fit and function in AO SMITH water heater applications
• Supports self-powered millivolt control circuits that require no external electrical supply

Compatibility

Designed as an OEM-style replacement thermopile for AO SMITH gas water heater models using a standing pilot, millivolt gas control system.

Installation Notes

Installation should be performed by a licensed plumber or qualified gas appliance technician. Before servicing, shut off the gas supply to the water heater and allow the unit to cool completely. Connections at the gas valve and pilot assembly should be inspected for proper seating and leak-tested after reassembly in accordance with local gas codes and IFGC guidelines. Do not operate the unit with a degraded or incorrectly seated thermopile.

Technical Specifications

• Product Type: Thermopile

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100112327