OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA120224ABWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1REA120224ABWA packaged unit. The DSI control board is the nerve center of your unit's heating sequence — it manages spark ignition timing, flame sensing, gas valve activation, inducer operation, and safety lockout logic. When this board fails, common symptoms include a unit that attempts ignition and then locks out, a system that powers on but produces no heat, repeated ignition retries without flame establishment, or fault codes indicating a control board or ignition system failure.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Supersedes LH33WP002A | Factory-matched logic and timing sequences for Carrier PY-series packaged units
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards preserve exact ignition timing tolerances, safety lockout thresholds, and flame-sensing sensitivity. Aftermarket boards may introduce nuisance lockouts, miswired terminals, or incompatible logic that voids equipment warranties.
• Install Difficulty: 3/5 — Disconnect power at the disconnect switch and verify zero voltage with a multimeter before handling. Photograph all wiring harness connections before removal. Tools needed: Phillips and flathead screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. A trained HVAC technician is strongly recommended for this repair.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1REA120224ABWA packaged gas/electric unit. Also used across select Carrier, Bryant, and Payne 48, 574, 580, 581, 582, 583, 588, 589, and PY-series models — always verify your unit's data plate and existing board part number before ordering. Our parts specialists are available to confirm fitment prior to purchase. Order today and your part ships the same business day.