Rheem-Ruud AS39758 Ignitor Assembly

The Rheem-Ruud AS39758 Ignitor Assembly is a high-precision OEM replacement part engineered for reliable ignition in commercial and residential gas-fired HVAC systems. As a critical Low NOx pilot assembly, this component ensures a stable flame signal to the ignition control module, preventing nuisance lockouts and ensuring consistent burner firing. Built to meet rigorous factory specifications, the AS39758 features a robust mounting bracket for precise alignment within the combustion chamber, protecting the ceramic insulator and spark electrode from vibration and thermal stress. This assembly is frequently found in Rheem and Ruud G100MF, G75MF, and G91MF series units. Unlike generic alternatives, this genuine Rheem part maintains the integrity of the pilot-to-burner relationship, ensuring efficient combustion and compliance with environmental Low NOx standards for modern gas furnace maintenance and repair.

• OEM Precision: Guaranteed compatibility with Rheem-Ruud gas heating equipment for seamless integration.
• Enhanced Durability: Constructed with high-grade materials to withstand continuous thermal cycling and high-heat environments.
• Optimized Ignition: Designed specifically for Low NOx systems to provide a reliable spark for efficient fuel ignition.
• Simplified Installation: Includes the factory-aligned bracket for exact positioning, reducing labor time during service calls.

Is the AS39758 compatible with standard residential furnaces?
This assembly is primarily utilized in commercial and high-efficiency residential gas units, specifically those requiring Low NOx pilot assemblies. Always verify the model and serial number of the unit to ensure correct fitment.

Does this assembly include the spark cable?
The AS39758 typically includes the pilot assembly and integrated electrode mounted on the bracket. Technicians should inspect existing wiring for continuity before replacing the assembly.

What causes this ignitor assembly to fail prematurely?
Common failure points include carbon buildup on the electrode, a cracked ceramic insulator, or oxidation of the pilot orifice, all of which can disrupt the ionization signal.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.