Trane KIT9370 Retrofit Kit

The Trane KIT9370 is a comprehensive furnace control board retrofit kit engineered to replace obsolete White-Rodgers integrated furnace controls. This OEM-spec kit serves as the direct replacement for 50A51-506 and 50A51-507 ignition modules found in many residential and light commercial Trane and American Standard furnaces. By upgrading to the Trane KIT9370 Retrofit Kit, technicians transition from older Silicon Carbide (SiC) ignition systems to high-reliability Silicon Nitride (SiNi) technology. The package includes the CNT02223 control board, a new igniter, transformer, door switch, and specialized wiring harness adapters. This 24V, 60Hz module features advanced microprocessor-based circuitry for precise monitoring of gas valves, inducer motors, and blower operations. Integrated LED diagnostic indicators provide real-time status and fault codes, simplifying troubleshooting in the field. This HVAC replacement part is essential for restoring system performance and improving diagnostic visibility in aging equipment.

Key Benefits for Technicians:

• Universal Compatibility: Specifically designed to replace White-Rodgers 50A51-506 and 50A51-507 models without cabinet modifications.
• Advanced Diagnostics: Features flash code diagnostics via on-board LED, allowing for rapid identification of pressure switch, flame, or limit circuit issues.
• Igniter Upgrade: Converts systems to durable Silicon Nitride (SiNi) ignition, reducing nuisance calls for failed hot surface igniters.
• Complete Installation Kit: Includes the CNT02223 board, mounting hardware, and harness adapters to ensure a professional, secure retrofit.

Common Questions & Technical Support:

What does the Trane KIT9370 replace?
This kit is the official substitute for 50A51-506 and 50A51-507 controls. It is also a recommended upgrade for managing two-stage, variable-speed furnace operations that utilize older White-Rodgers platforms.

Why does this kit include a new igniter?
The KIT9370 Retrofit Kit upgrades the furnace from Silicon Carbide to Silicon Nitride technology. The new CNT02223 control board is specifically calibrated for the electrical characteristics of the included SiNi igniter, necessitating the replacement of the original component.

Are wiring modifications required?
While the kit is designed for seamless integration, it includes specialized harness adapters to bridge the original wiring to the new module. Technicians should always verify terminal labels against the provided wiring diagram during the control board installation.

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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.