OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB048090NBAA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1PEB048090NBAA packaged gas/electric unit. The DSI control board is the central intelligence of your heating system — it coordinates the spark igniter, gas valve, combustion blower, and indoor fan motor while continuously monitoring trial-for-ignition timing, flame sensing, and safety lockout sequences. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, short cycling after burner light-off, or fault codes indicating a failed ignition attempt. Replacing the board with the correct OEM part restores factory-programmed timing and safety logic, ensuring reliable, code-compliant operation.

• Specs: Direct Spark Ignition (DSI) | Microprocessor-based IFC | 460V application | Monitors spark igniter, gas valve, flame sensor, and blower motor sequencing | Replaces legacy part LH33WP002A
• OEM vs Generic: This genuine Carrier OEM board is factory-programmed with exact ignition timing, lockout thresholds, and blower delay profiles for the PY1PEB048090NBAA. Aftermarket boards may use approximate timing values that cause nuisance lockouts, premature heat exchanger stress, or void equipment warranties.
• Install Difficulty: 3/5 — Disconnect all power and gas before beginning. Tools needed: ¼" and 5/16" nut drivers, needle-nose pliers, phone or camera to document all wiring connections prior to removal. Transfer wiring harnesses one connector at a time to avoid miswiring. Confirm all fault codes are cleared after installation.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Designed for the Carrier PY1PEB048090NBAA packaged unit and confirmed for use across Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series. Always verify the part number on your existing board's label before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — in stock and ready to ship today.