Reznor 209339 Spark Electrode

Maintaining reliable ignition in Reznor commercial and industrial HVAC equipment requires precision components capable of withstanding high-thermal stress. The Reznor 209339 Spark Electrode (also identified as PSE-RZ9) is the direct OEM replacement engineered to deliver consistent high-voltage arcing to ignite the gas-air mixture across various unit heater and air handler platforms. Featuring a 31-1/2 inch length, this spark igniter electrode is a critical part of the Direct Spark Ignition (DSI) sequence, ensuring dependable burner start-up while minimizing ignition delays that lead to nuisance lockouts. Constructed from professional-grade ceramic insulation and a durable metal alloy rod, it is designed for maximum resistance to thermal shock and corrosion in high-cycle environments. This electrode is compatible with a wide range of Reznor series, including PDH, SDH, RDH, SHH, and RHH models. For contractors performing routine maintenance or emergency repairs, replacing a fouled or cracked ignition electrode with this genuine Reznor 209339 part restores factory-spec performance and flame rectification accuracy.

• Direct OEM Compatibility: Specifically engineered for Reznor PDH, SDH, RDH, SHH, and RHH series heaters to ensure exact fitment and proper gap alignment.
• Extended Service Durability: High-grade ceramic housing prevents voltage leakage and resists cracking under extreme temperature fluctuations.
• Optimized Ignition Sequence: Provides the precise spark intensity required for efficient gas ignition, reducing the risk of delayed ignition and unit vibration.
• Simplified Field Replacement: Standard 31-1/2" length allows for straightforward installation without the need for field modifications.

How do I verify if the 209339 electrode is faulty?
Inspect the ceramic insulator for hairline cracks where high voltage might arc to the ground before reaching the tip. Also, check for carbon buildup on the rod, which can be cleaned with light steel wool to restore proper resistance for flame rectification.

What causes a "No Spark" condition during the ignition trial?
Ensure the high-voltage wire is securely seated on the electrode terminal. If the DSI board is sending 24V to the primary side but no spark occurs at the electrode, check for a cracked insulator or a compromised ground path before replacing the control module.

Can this electrode be used for flame sensing?
Yes, in many Reznor DSI systems, this electrode serves the dual purpose of creating the spark and then acting as a flame rod for flame rectification once the burner is lit.

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.