OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA090125ACWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1REA090125ACWA packaged gas/electric unit. The DSI control board is the brain of the ignition system — it sequences the inducer motor, gas valve, spark ignitor, and flame verification circuit on every call for heat. When this board fails, the unit typically enters a safety lockout after one or more failed ignition attempts, displays a fault code, or produces no heat at all despite the thermostat calling for it.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Replaces legacy part LH33WP002A | Factory-programmed timing and lockout logic
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards carry exact factory ignition timing, retry sequences, and fault code logic. Aftermarket boards may use different timing tolerances, risking nuisance lockouts or unsafe ignition behavior.
• Install Difficulty: 3/5 — Requires shutting off power and gas supply before servicing. Tools needed: 1/4" and 5/16" nut drivers, flathead screwdriver, needle-nose pliers, multimeter. Always photograph all wiring harness connections before disconnecting. Recommend a qualified HVAC technician for this repair.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1REA090125ACWA packaged unit. Also used across Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series with DSI ignition systems. Always verify your existing board's part number against LH33WP002 before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — call or chat today.