Ao Smith 100111830 Flame Sensor GDHE-50

Product Description

The AO SMITH 100111830 is a replacement flame sensor designed for use in gas-fired water heater applications. The flame sensor monitors the burner flame signal during operation, confirming ignition and allowing the control system to continue the heating cycle. Without a functioning flame sensor, the control board cannot verify combustion and will shut down the burner as a safety measure. This part is installed by licensed plumbers and HVAC technicians servicing residential gas water heater systems.

This flame sensor is used with the AO SMITH GDHE-50 gas water heater. It serves as a direct OEM-style replacement for the original sensor in that unit, restoring proper burner proving function after sensor failure or degraded signal output. Typical installation scenarios include service calls where the unit short-cycles, fails to stay lit, or throws a flame-sensing fault code on the control board.

Key Features

• OEM replacement flame sensor for the AO SMITH GDHE-50 gas water heater
• Restores burner proving function and prevents nuisance shutdowns caused by failed or weak flame signal
• Direct drop-in replacement reduces diagnostic and installation time
• Designed for plumbing and HVAC service applications in residential gas water heater systems

Compatibility

Designed as a replacement flame sensor for use with the AO SMITH GDHE-50 gas water heater series.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician. Before servicing, shut off gas supply to the unit and disconnect electrical power to prevent accidental ignition or shock. The flame sensor rod should be inspected for oxidation or carbon buildup, and the mounting area should be clean and free of debris before installing the replacement. Follow all applicable local codes and the manufacturer service documentation during installation.

Technical Specifications

• Application: Plumbing
• Part Type: Replacement Part
• Used With: GDHE-50

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100111830