Ao Smith 100110771 Hot Surface Igniter Replaces: 9005958

Product Description

The AO SMITH 100110771 is a hot surface igniter designed as a direct replacement component for residential and light commercial water heater systems. The igniter serves as the spark-free ignition source in gas-fired appliances, heating the silicon nitride or similar element to ignition temperature to reliably light the main burner. Licensed plumbers and HVAC technicians install this part during routine service calls or when diagnosing a no-heat or ignition-failure condition. It is a drop-in OEM-style replacement for the superseded part number 9005958.

This igniter is used in AO SMITH gas water heaters equipped with hot surface ignition control systems. It is suited for residential installations where the original igniter has failed, cracked, or is showing elevated resistance outside of the manufacturer's acceptable range. Technicians replacing this component typically encounter it during a no-hot-water call traced to ignition system failure rather than a gas valve or thermostat fault.

Key Features

• Direct replacement for superseded AO SMITH part number 9005958
• OEM-style hot surface ignition element for reliable burner light-off
• Designed for gas-fired water heater ignition systems
• Drop-in fitment reduces service time on compatible units

Compatibility

Serves as a direct replacement for AO SMITH part number 9005958. Refer to the unit's service manual or nameplate to confirm igniter compatibility before installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with local codes and the appliance manufacturer's service documentation. Shut off the gas supply and disconnect electrical power to the water heater before beginning any igniter replacement work. Handle the igniter element carefully, as mechanical stress or contact with oils from bare hands can shorten service life. Verify correct resistance of the replacement igniter with a multimeter before energizing the system.

Technical Specifications

• Part Type: Hot Surface Igniter
• Replaces Part Number: 9005958

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100110771