Igniter With Gasket

RTG20212BD Igniter with Gasket – Direct-Fit Ignition Component for Rheem Tankless Units

The Rheem RTG20212BD is a factory-authorized igniter assembly with gasket, engineered for compatibility with specific Rheem, Ruud, and Richmond tankless gas water heater models. This component provides the high-voltage spark required for burner ignition, and is critical to the start-up sequence and safe operation of the unit.

Component Function

This silicon nitride or ceramic-based igniter generates the ignition spark when signaled by the control board during a demand cycle. The included gasket provides a sealed installation interface, maintaining combustion chamber integrity and preventing gas leakage during operation. The igniter is positioned near the burner manifold and must be aligned precisely to ensure reliable arc generation across the designated gap.

Specifications

• Part Number: RTG20212BD
• Application: Ignition spark assembly with mounting gasket
• Compatibility: Rheem, Ruud, Richmond tankless gas water heaters (model-specific; verify prior to ordering)
• Construction: High-temperature ceramic or silicon nitride igniter with integrated leads
• Mounting: Direct bolt-on with OEM gasket

Installation Requirements

Installation must be performed with the power and gas supply fully disconnected. Proper alignment is critical to avoid misfires or incomplete ignition. The igniter lead should be securely attached to the control module terminal. The gasket must be seated correctly to ensure a sealed combustion interface. Verify system diagnostics after installation to confirm correct igniter function and flame detection.

Service Applications

Replace the RTG20212BD in cases of failed ignition, sparking issues, ignition fault codes (e.g., error code 11), or visible wear/damage to the existing igniter. This is a wear item subject to thermal cycling and carbon fouling over time. Use only the OEM part to ensure compatibility with system control logic and flame sensing tolerances.

Key Attributes

• OEM-Certified Replacement – Ensures electrical and mechanical compatibility with Rheem’s ignition control system
• Includes Combustion Gasket – Maintains sealed burner compartment and protects against gas leakage
• Reliable Arc Performance – Delivers consistent, high-voltage spark across burn cycles
• High-Temperature Design – Resistant to cracking and degradation from prolonged burner exposure