Trane KIT9660 Conversion Kit

The Trane KIT9660 Conversion Kit is a critical OEM replacement engineered to modernize flame detection in legacy forced-air systems. As the direct replacement for CNT1643, this radiant to flame sense conversion kit transitions aging furnace architectures from obsolete radiant sensing to contemporary flame ionization technology. This upgrade is foundational for technicians looking to resolve intermittent ignition failures and improve flame detection accuracy. The kit integrates a high-performance SEN00491 flame sensor and a 120V White-Rodgers 50A55-486 ignition control board, ensuring compatibility with select Trane and American Standard furnaces. By eliminating the mechanical lag inherent in older radiant assemblies, the Trane KIT9660 provides rapid signal feedback to the microprocessor, significantly reducing late-ignition scenarios. This field-proven HVAC flame sensor upgrade includes essential multi-pin wiring harnesses and mounting hardware, allowing contractors to restore furnace ignition reliability without costly unit replacements or extensive cabinet modifications.

Key Benefits

• Precise Signal Response: Replaces thermal-based radiant sensing with rapid microamp flame sensing for superior system safety and timing.
• Universal Compatibility: Serves as the primary CNT1643 replacement, fitting established footprints in older gas-fired furnace platforms.
• Integrated Control Logic: Includes a White-Rodgers control board designed for optimized prepurge and trial-for-ignition cycles.
• Full Installation Hardware: Contains all necessary wiring harnesses, sensors, and structural fasteners to complete a professional conversion in one visit.

Common Questions

How do I know if I need the KIT9660 versus a standard sensor?
If your current furnace utilizes the older CNT1643 radiant sensor and is suffering from frequent lockouts or slow ignition detection, this flame sense conversion kit is the designated factory upgrade to modernize the sensing circuit.

Does this kit include the circuit board?
Yes, the Trane KIT9660 is a comprehensive assembly that includes the 50A55-486 ignition control board required to process the flame ionization signal from the new sensor.

Is this a direct fit for older American Standard units?
Correct. This kit is the factory-authorized replacement for both Trane and American Standard systems that originally shipped with the radiant sensor assembly.

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.