Carrier 325879-751 Circuit Board/Plug Kit

The Carrier 325879-751 Circuit Board/Plug Kit serves as the definitive OEM furnace control board replacement for troubleshooting ignition failures and blower motor malfunctions in Carrier, Bryant, and Payne units. Engineered as a direct cross-reference for legacy part numbers HK42FZ005, HK42FZ010, and HK42FZ015, this integrated furnace control (IFC) manages critical furnace sequencing, including inducer motor cycles, hot surface ignition, and HVAC flame sensor monitoring. For technicians dealing with diagnostic code errors, this factory-tested 325879-751 circuit board provides a streamlined installation process via the included plug kit, ensuring electrical compatibility with existing harnesses. Relying on genuine Carrier replacement parts maintains the factory-specified logic necessary for safe gas valve operation and optimal furnace control board troubleshooting. This kit is essential for restoring 24V control circuit integrity and reliable multi-speed blower timing in high-efficiency residential furnaces.

• Universal Compatibility: Engineered to replace various older HK42FZ series boards without requiring field modifications to the cabinet.
• Enhanced Diagnostics: Features an onboard LED indicator to streamline Carrier furnace troubleshooting and fault code identification.
• OEM Reliability: Sourced directly from the manufacturer to ensure tight tolerances on relay switching and microprocessor logic.
• Complete Setup: Includes the necessary harness and plug kit to accommodate different wiring configurations found in older furnace models.

Will this board replace my HK42FZ010 without rewiring?
Yes, the 325879-751 is a direct-fit replacement. The included plug kit ensures that terminal labels and harness connections align with the original factory specifications for the HK42FZ series.

What does it mean if the status light on this board is flashing?
The flashing LED acts as a diagnostic tool. Refer to the furnace service manual or the door chart to correlate the flash count with specific system faults like pressure switch stuck open or limit circuit lockout.

Is this board compatible with both PSC and ECM blower motors?
This specific control board is designed for systems utilizing standard multi-speed PSC blower motors typical of the HK42FZ application range. Always verify your specific furnace model number before installation.

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.