OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEA042100ADBA

This is the genuine OEM Direct Spark Ignition (DSI) Control Board for the Carrier PY1PEA042100ADBA packaged gas/electric unit. As the brain of the heating sequence, the DSI control board manages the complete ignition cycle — commanding the inducer motor, energizing the spark igniter, proving flame via the flame sensor, and opening the gas valve in the correct sequence. When this board fails, common symptoms include a hard lockout with no heat, repeated failed ignition attempts, error codes on the thermostat, or the system shutting down immediately after startup. Replacing the board with a factory-matched OEM unit restores the precise timing and safety logic Carrier engineered into the system.

• OEM Part Number: LH33WP002 | Also replaces: LH33WP002A | Factory Authorized Part — exact fit for Carrier PY1PEA042100ADBA
• OEM vs Generic: This is a genuine Carrier OEM board, not an aftermarket substitute. OEM boards carry the factory-programmed ignition timing and lockout logic, preserving your unit's safety certifications and preventing premature component wear.
• Install Difficulty: 3/5 — Shut off power and gas before beginning. Tools needed: screwdrivers (flat and Phillips), needle-nose pliers, camera or phone to photograph all wiring harness connections before removal. Typical tech time: 30–60 minutes.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1PEA042100ADBA packaged unit. Verify your existing board's part number against LH33WP002 or LH33WP002A before ordering. Not sure if this is the right board? Our HVAC parts team confirms fitment before you buy — no guesswork, no returns.