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The Carrier HK42FZ013 Integrated Furnace Control (IFC) board is the factory-specified OEM replacement for the PG9MAB048080AASA gas furnace. This microprocessor-based board is the brain of the furnace — it sequences and monitors every critical operation including the inducer motor, hot surface igniter, gas valve, and blower motor. When the board fails, you may experience a complete no-heat condition, a furnace that locks out after one ignition attempt, erratic blower behavior, or fault codes that won't clear even after a manual reset.
Compatibility: Designed for the Carrier PG9MAB048080AASA gas furnace (4-ton, 80,000 BTU, single-stage). Also cross-compatible with the HK42FZ004, HK42FZ007, HK42FZ008, HK42FZ009, HK42FZ011, and HK42FZ016 series boards. Always verify your existing board's part number on the label before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.