OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA060090AB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY3PEA060090AB packaged unit. As the central brain of the heating system, this board manages the complete ignition sequence — energizing the inducer motor, proving pressure switch closure, firing the direct spark igniter, confirming flame, and staging the gas valve. When this board fails, you'll typically see a hard lockout with no ignition attempt, repeated ignition failures, or the unit firing briefly then shutting down on a fault code. In multi-stage or commercial packaged units like the PY3PEA060090AB, a failed DSI board can completely disable the heating section while leaving cooling unaffected — a symptom that often points directly to this component.

• Specs: Direct Spark Ignition (DSI) control | 460V application | Replaces superseded part LH33WP002A | Factory-matched timing sequences and lockout logic
• OEM vs Generic: Genuine Carrier OEM boards carry exact factory-programmed ignition timing, lockout retry counts, and fault code logic. Aftermarket boards frequently use generic timing profiles that can cause nuisance lockouts, premature component wear, or safety trip failures — especially in commercial packaged equipment.
• Install difficulty: 3/5 — Disconnect power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone/camera to photograph all wiring before removal. Label every connector. Some boards require a control board reset after installation. Recommend a qualified HVAC technician for commercial packaged units.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PY3PEA060090AB packaged gas/electric unit. Also used across Carrier, Bryant, and Payne packaged models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — always verify your unit's data plate and existing board part number before ordering. Our fitment team is available to confirm compatibility before you purchase.