Ao Smith 100191120 Spark Igniter

Product Description

The AO SMITH 100191120 is a spark igniter designed to initiate combustion in water heating systems. This component generates the electrical spark that lights the burner assembly, triggering the heating cycle. It serves as a critical part of the ignition system, ensuring reliable burner startup under normal operating conditions. Licensed plumbers and HVAC technicians typically handle replacement of this part during routine service calls or when ignition failure is diagnosed. Its straightforward function makes it a go-to replacement component when a water heater fails to ignite.

This spark igniter is intended for use in AO SMITH water heating equipment where spark ignition is part of the standard burner control sequence. It is suited for residential and light commercial water heater applications that rely on spark-to-pilot or direct spark ignition systems. When the existing igniter shows signs of wear, carbon buildup, or electrical failure, this part serves as the direct service replacement to restore normal ignition function.

Key Features

• Generates reliable electrical spark to initiate burner combustion
• Designed as a direct-fit replacement for AO SMITH water heating equipment
• Supports spark ignition sequences in standard burner control systems
• Compact igniter format suited for typical water heater burner assemblies

Compatibility

Designed as an OEM-style replacement spark igniter for AO SMITH water heating systems equipped with spark ignition burner assemblies.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Before servicing, shut off the gas supply and disconnect electrical power to the water heater to prevent accidental ignition or shock. Inspect the igniter lead connections and electrode gap during installation to confirm proper seating before restoring gas and power. Work should comply with applicable local codes and the manufacturer service documentation.

Technical Specifications

• Type: Ignitor

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100191120