OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB048130AAAA

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier PY1PEB048130AAAA packaged unit. The DSI control board is the nerve center of the heating system — it sequences the inducer motor, manages spark ignition timing, monitors the flame sensor signal, and executes safety lockout protocols. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, fault codes on the system, or a furnace that sparks but never establishes a stable flame. Replacing this board with the correct OEM part restores factory-programmed timing sequences and safety thresholds that aftermarket boards frequently cannot match.

• Part Number: LH33WP002 | OEM Direct Spark Ignition (DSI) Control Board | Factory-original Carrier replacement | 460V application
• OEM vs Generic: OEM DSI boards use factory-calibrated ignition timing and flame-sensing thresholds. Generic substitutes often run with looser tolerances, which can cause nuisance lockouts, premature heat exchanger stress, or failed safety shutdowns — putting equipment and occupants at risk.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring harnesses and line-voltage connections. Always shut off power at the disconnect and verify zero voltage with a multimeter before proceeding. Photograph all wiring connections before removal. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse when ordered before the daily cutoff.

Compatibility: Designed as a direct OEM replacement for Carrier model PY1PEB048130AAAA packaged units. Verify your existing board's part number against LH33WP002 before ordering. Not sure if this is the right board? Our HVAC parts specialists confirm fitment before you buy — contact us with your model and serial number.