Ao Smith 100187881 Spark Ignitor Assembly

Product Description

The AO SMITH 100187881 is a spark ignitor assembly designed to initiate combustion in gas-fired heating equipment. The assembly generates a high-voltage spark at the burner, triggering ignition each time the heating cycle calls for heat. It replaces a failed or degraded ignitor as a direct OEM-style component, restoring reliable ignition performance. HVAC technicians and plumbers working on gas appliances install this part during routine service or when diagnosing ignition failure. Its function is critical to safe, consistent burner operation throughout the heating season.

This spark ignitor assembly is intended for heating applications. It is suited for gas-fired systems where spark ignition is used in place of standing pilot or hot-surface ignition methods. Typical install scenarios include replacing a cracked, fouled, or electrically failed ignitor during a no-heat service call. The application designation supplied with this part confirms its use in heating equipment, making it appropriate for residential or light commercial gas appliances that rely on spark ignition for burner startup.

Key Features

• Spark ignition design initiates combustion at the burner on each heat call
• OEM-style replacement restores factory ignition performance
• Suited for gas-fired heating equipment using spark ignition systems
• Direct swap format simplifies field replacement during service calls

Compatibility

Designed as an OEM-style replacement spark ignitor assembly for gas-fired heating equipment. No specific compatible model numbers or system families were provided in the available product data.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified gas appliance service professional. Shut off gas supply and disconnect electrical power to the appliance before beginning any ignitor replacement. Handle the ignitor assembly carefully to avoid cracking or contaminating the electrode tip, as physical damage can prevent reliable spark generation. Follow all applicable local codes and the appliance manufacturer service documentation when completing the replacement.

Technical Specifications

• Application: Heating

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100187881