Lennox 19S83 Control Board

The Lennox 19S83 Control Board is a high-performance BCC3 Fan Control Board designed for professional HVAC application in Lennox G20, G23, and G26 series units. As a veteran-grade HVAC blower control replacement, the 19S83 is engineered to manage critical timing for blower motor operation, ensuring precise fan speed regulation across both heating and cooling cycles. This OEM Lennox part functions as a versatile HVAC circuit board, featuring built-in on/off delay timers to optimize system efficiency and prevent short-cycling. The kit includes the refined BCC3 control board, a dedicated 6-pin wire harness with a 3/16-inch quick connect for 24V terminals, and updated installation hardware. By managing the inducer motor and blower contacts with industrial-grade reliability, this 19S83 Blower Control Kit restores factory-standard performance to aging residential and commercial furnaces.

Commonly Replaces: 48K98, LB-65126A, 65K29, BCC2-3, LB-90089A, 621344-01, 10X99, 35K77, 40L88, 78J61, and 68H08.

• Universal Compatibility: Serves as the primary Lennox 19S83 direct replacement for a wide range of legacy BCC1, BCC2, and BCC3 boards in G20 and G23 series.
• Enhanced Blower Timing: Features adjustable blower off-delay settings (90, 150, 210, 270 seconds) to maximize latent heat recovery.
• Simplified Retrofit: Included 106364-01 wire harness and 3/16-inch blue wire allow for seamless 24V connection regardless of original terminal sizing.
• Robust Load Handling: Rated for 20A at 120VAC for blower outputs and 5A for inducer motor circuits.
• Genuine OEM Build: Manufactured to original Lennox HVAC part specifications for exact mounting and terminal alignment.

Is the Lennox 19S83 compatible with older BCC2 boards?
Yes, the 19S83 is the official BCC3 upgrade for units originally equipped with BCC1 or BCC2 boards. The included wiring harness ensures compatibility with older terminal configurations.

What is the purpose of the blue wire in the 19S83 kit?
The provided blue wire is a 24V adapter used when replacing early BCC controls that utilized 1/4-inch terminals, adapting them to the 3/16-inch terminals found on the modern BCC3 board.

Does this board control the combustion air blower?
On G23 series units, the board regulates the combustion air blower via the CAB terminal. On G20 units without a combustion blower, this terminal is typically utilized for damper motor control.

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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.