OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA150224ADWB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1REA150224ADWB packaged unit. The DSI control board serves as the command center of your heating system — it manages the ignition sequence, monitors flame signal, coordinates gas valve operation, and communicates fault codes. When this board fails, common symptoms include hard lockout after an ignition attempt, no-heat calls with the inducer running but no spark, repeated short-cycling, or a completely unresponsive heating system with no fault codes displayed.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | Replaces superseded part LH33WP002A | Factory-matched timing and fault logic for Carrier PY-series packaged units
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards retain factory-programmed ignition timing, lockout retry counts, and safety thresholds. Aftermarket boards may use approximated logic that can cause nuisance lockouts, voided warranties, or unsafe operation.
• Install difficulty: 3/5 — Disconnect and lock out power before beginning. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections before removal. Label every connector; incorrect reassembly will cause immediate lockout. Recommend professional installation for commercial packaged units.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PY1REA150224ADWB packaged unit. Also used on select Carrier, Bryant, and Payne 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.