OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA042090NB

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier PY3PEA042090NB packaged unit. The DSI control board serves as the brain of the heating system, orchestrating the ignition sequence — managing the inducer motor, gas valve, spark igniter, and flame sensing circuit in precise coordination. When this board fails, the unit typically enters a safety lockout condition with no heat output, attempts ignition without firing, or displays fault codes indicating a failed ignition sequence or a loss of flame signal.

• Specs: Direct Spark Ignition (DSI) control board | OEM part number LH33WP002 | 460V ignition control module | Factory-programmed timing and lockout logic for Carrier packaged units
• OEM vs Generic: This is a genuine Carrier OEM board, not an aftermarket substitute. OEM boards retain exact factory-programmed ignition timing, safety lockout sequences, and flame signal thresholds — critical for safe and reliable operation. Generic alternatives often ship without validated firmware, risking nuisance lockouts or unsafe ignition behavior.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter, and needle-nose pliers. Photograph all wiring harness connections before removal. Note: gas packaged units require care around gas valve wiring — follow all local codes and manufacturer procedures.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct factory replacement for Carrier model PY3PEA042090NB packaged heating and cooling units. Verify your existing board's part number on the board label or unit data plate before ordering to confirm exact fitment. Need help confirming compatibility? Our HVAC parts specialists are standing by to verify before you buy — order now for same-day shipping.