Ao Smith 100109355 Ignitor Assembly Natural Gas

Product Description

The AO SMITH 100109355 is a natural gas ignitor assembly designed for use in residential and light commercial water heater systems. The ignitor assembly initiates combustion by generating the spark or glow necessary to light the burner. This component is a direct service part intended for installation by licensed plumbers or HVAC technicians performing water heater repair or maintenance. When the original ignitor fails to light the burner, replacing the ignitor assembly restores safe and reliable burner ignition without replacing the full unit.

This ignitor assembly is suited for natural gas water heater applications where the original ignition component has worn out or failed. It is a replacement-grade assembly appropriate for service calls involving no-heat or ignition-failure diagnostics on AO SMITH natural gas water heater equipment. Technicians should confirm the fuel type and burner assembly configuration before ordering to ensure proper fitment.

Key Features

• Configured for natural gas fuel systems
• Direct replacement for failed or worn ignitor assemblies
• Designed for residential and light commercial water heater applications
• Supports restoration of reliable burner ignition without full unit replacement

Compatibility

Designed as an OEM-style replacement ignitor assembly for AO SMITH natural gas water heaters. Confirm model number and burner assembly configuration prior to installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician familiar with gas appliance service. Shut off the gas supply and disconnect power to the water heater before beginning any service work. Refer to the appliance service manual and applicable local codes, including IFGC requirements, when servicing gas ignition components. Do not restore gas flow or energize the unit until the ignitor assembly is fully seated and all connections are verified.

Technical Specifications

• Fuel Type: Natural Gas
• Component Type: Ignitor Assembly

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109355