OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048130NB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY3PEA048130NB packaged unit. The DSI control board serves as the central intelligence of the heating system — it sequences the inducer motor, manages spark ignition timing, monitors the flame sensor signal, and controls gas valve operation. When this board fails, the unit will typically enter a hard lockout after one or more failed ignition attempts, display fault codes, or refuse to fire entirely, leaving occupants with no heat.

• Specs: 460V application | Direct Spark Ignition (DSI) control | OEM part number LH33WP002 | Replaces legacy part LH33WP002A | Factory-matched timing and sequencing logic
• OEM vs Generic: Genuine Carrier OEM boards use factory-programmed microcontrollers with exact ignition timing, lockout thresholds, and fault code logic. Aftermarket substitutes frequently use generalized firmware that can cause nuisance lockouts, missed ignition events, or unsafe fault handling — putting both equipment and occupants at risk.
• Install difficulty: 3/5 — Disconnect power and verify zero voltage before starting. Tools needed: Phillips and flat-head screwdrivers, 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera to document all wiring connections prior to removal. Transfer wiring terminal by terminal. Restore power only after all connections are confirmed secure.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PEA048130NB packaged gas/electric unit. Also used on a broad range of Carrier, Bryant, and Payne packaged and split 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. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — same-day response guaranteed.