Natural Gas Ignitor/Flame Sensor

Bradford White 415-40918-00 – OEM Ignitor and Flame Sensor Assembly

The Bradford White 415-40918-00 is a factory-specified ignitor and flame sensor assembly used in select atmospheric vent natural gas water heaters. This component serves a dual role: providing ignition for the pilot and verifying flame presence through a rectification circuit. Its integration with the burner assembly ensures safe and reliable operation in systems designed with electronic ignition controls.

Application and Compatibility

This ignitor/flame sensor assembly is designed for compatibility with Bradford White models utilizing the CX10 burner configuration, including:

• MIITW50TLN, EN, CX10
• MIITW65TEN, CX10

It is intended for use with natural gas burner assemblies and is matched to specific Honeywell and White-Rodgers ignition systems used in Bradford White’s atmospheric tank-style water heaters.

Functional Specifications

• Ignitor Type: Hot Surface Ignition (HSI)
• Sensor Function: Flame rectification for burner flame verification
• Power Requirements: Operates on 120V or 24V depending on the control board design
• Construction: High-temperature rated ceramic and metal electrode body
• Lead Termination: Pre-wired with OEM connectors for direct-fit installation

Installation Requirements

Installation of the 415-40918-00 should be performed by qualified service personnel. The ignitor and sensor must be positioned and secured exactly according to manufacturer specifications to ensure proper ignition timing, flame detection, and safe operation. Incorrect positioning or loose connection may lead to nuisance lockouts or ignition failure. Always verify compatibility by model number and burner configuration prior to installation.

Service Considerations

• OEM Replacement: This part is not universal and should only be used where specified.
• Routine Maintenance: Flame signal strength and ignitor condition should be evaluated during annual service intervals.
• Replacement Indicators: Failure to ignite, intermittent flame sensing, or visible damage to ceramic insulation are signs this part may require replacement.

Contractor Notes

The 415-40918-00 is a critical part of the ignition system for CX10-equipped units. Stocking this OEM assembly can minimize downtime on service calls and ensure compliance with manufacturer safety standards. It is also commonly replaced during burner rebuilds or control system upgrades in older Bradford White models using HSI technology.