OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA048115AAWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1REA048115AAWA packaged unit. The DSI control board is the operational nerve center of your heating system — it sequences the inducer motor, manages direct spark ignition timing, monitors the flame sensor signal, and coordinates gas valve operation. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockout codes, the inducer running without a spark attempt, or the unit cycling off immediately after ignition. Replacing this board with the correct OEM part restores factory-programmed timing and safety thresholds.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Replaces superseded part LH33WP002A | Factory-matched control sequencing and lockout logic
• OEM vs Generic: OEM boards use Carrier's exact firmware and component-grade tolerances. Aftermarket boards may introduce timing mismatches that cause nuisance lockouts, void equipment warranties, or fail safety inspections — not a risk worth taking on a gas-fired packaged unit.
• Install Difficulty: 3/5 — Disconnect all power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, camera or phone (photograph all wiring harness connections before removal). Transfer wiring connector by connector to the new board. Verify ignition on first call for heat before closing the unit.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered for the Carrier PY1REA048115AAWA packaged gas/electric unit. Also used across Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, and 589 series with DSI ignition systems. Always confirm the part number printed on your existing board before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy if you have any doubt.