OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA042060AA

This is the genuine OEM Carrier LH33WP002 Direct Spark Ignition (DSI) Control Board — the factory-specified replacement for the Carrier PY3PEA042060AA packaged gas/electric unit. The DSI control board serves as the central command module for the entire heating sequence: it manages the inducer motor, controls spark ignition timing, monitors flame sensing feedback, supervises pressure switches, and sequences the blower fan. When this board fails, symptoms typically include a complete no-heat condition, repeated ignition lockout faults, erratic short-cycling, or the system failing to advance past the ignition stage. Replacing it with a genuine OEM board — not an aftermarket substitute — ensures exact timing parameters, correct fault code behavior, and full compatibility with all connected safety controls.

• Part Number: LH33WP002 (supersedes LH33WP002A) | Factory-matched Direct Spark Ignition (DSI) module | Rated for 460V operation | Manufactured to ANSI Z21.20 standards
• OEM vs Generic: The OEM LH33WP002 board uses factory-calibrated ignition timing and flame-sensing thresholds. Aftermarket boards often have wider tolerances that can cause nuisance lockouts, missed ignitions, or premature safety shutdowns — putting the heat exchanger and gas valve at risk.
• Install Difficulty: 3/5 — Shut off gas and 24V power at the disconnect before starting. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera (photograph all wiring harness connections before removal). Transfer one connector at a time to avoid miswiring. Verify fault codes clear after installation.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for the Carrier PY3PEA042060AA packaged unit. Also fits a wide range of Carrier 48-series packaged rooftop units — verify your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase.