Reznor 98697 Flame Sensing Probe

The Reznor 98697 Flame Sensing Probe is a precision-engineered OEM replacement part designed for critical flame rectification in gas-fired heating systems. This Y75AA-3 flame rod features a .114-inch diameter sensing element, specifically calibrated to monitor the pilot or main burner flame and provide instantaneous feedback to the primary ignition control. Built to withstand the extreme thermal stress of a combustion chamber, this probe utilizes a robust high-temperature ceramic insulator and a durable stainless steel electrode to ensure a stable microamp signal, preventing nuisance lockouts and HVAC system short cycling.

For service technicians, the Reznor 98697 is the standard specification for maintaining unit heater safety and efficient combustion. It is compatible with a wide range of Reznor equipment, including duct furnaces and unit heaters where accurate flame ionization sensing is required. Integrating this genuine Reznor heating part ensures the system meets original factory performance levels without the impedance issues often found in universal aftermarket alternatives. When troubleshooting gas furnace ignition failure, replacing a carbon-fouled or cracked probe with this factory-grade flame sensor is the most reliable path to restoring 100% operational uptime.

• Precise .114 Diameter: Matches exact OEM specifications for optimal fit and rapid signal response.
• High-Grade Construction: Features a high-tensile stainless steel rod and a heavy-duty ceramic sleeve to resist thermal cracking and oxidation.
• Direct OEM Compatibility: Replaces Reznor Y75AA-3, ensuring seamless integration with existing ignition modules and pilot assemblies.
• Enhanced System Safety: Provides the consistent microamp signal necessary for the control board to safely maintain the gas valve circuit.

• How do I tell if my Reznor flame sensor is bad? If your heater ignites but shuts off after a few seconds, it is likely failing to send a sufficient microamp signal. Inspect the Reznor 98697 for heavy carbon buildup, cracks in the ceramic, or a loose mounting bracket.
• Can I clean this probe instead of replacing it? While light soot can be removed with a fine abrasive, deep oxidation or any hairline fracture in the ceramic insulator necessitates a full replacement to ensure reliable flame detection.
• Does this part include the mounting screw? This SKU typically consists of the flame rod assembly itself; always retain your existing mounting hardware for the specific burner bracket.

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.