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This is the factory OEM ignition control board (IGC board) for the Carrier PY4GPAB42060NA packaged HVAC unit, carrying Carrier part number LH33WP007. The ignition control board is the command center of your system's heating sequence — it manages the inducer motor, hot surface igniter, gas valve, and flame sensor in precise, timed sequence. When this board fails, symptoms typically include a no-heat lockout, the system cycling on and off without igniting, error codes on the thermostat, or a complete failure to initiate the heating cycle.
Compatibility: Engineered as a direct OEM replacement for the Carrier PY4GPAB42060NA packaged unit. Always cross-reference your existing board's part number and any sticker revisions before ordering. Not sure it fits? Our HVAC parts specialists will verify fitment at no charge — contact us before you order.