OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA048115AAWB

This is the genuine OEM Direct Spark Ignition (DSI) Control Board for the Carrier PY1REA048115AAWB packaged gas/electric unit. The DSI control board serves as the brain of the heating sequence — it manages the ignition trial, monitors the flame sensor, sequences the gas valve, and controls the induced draft blower. When this board fails, the most common symptoms include a complete no-heat condition, repeated ignition lockout after a failed spark trial, or the system firing briefly then shutting down without ever establishing a stable flame. Replacing the board with the factory-specified OEM part restores precise control logic and ensures all safety lockouts function exactly as Carrier designed them.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number LH33WP002 | Also supersedes LH33WP002A | 460V ignition control logic | Factory-matched timing and lockout parameters
• OEM vs Generic: OEM boards carry factory-programmed ignition timing, retry logic, and safety lockout thresholds. Aftermarket boards often use generic firmware that can result in nuisance lockouts, improper retry sequencing, or failure to meet UL/ANSI Z21.20 certification standards — putting equipment and occupants at risk.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera to photograph all wire harness connections before removal. Transfer wiring connector by connector. Restore power only after all connections are confirmed secure.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1REA048115AAWB packaged unit. Also fits a wide range of Carrier 48-series packaged gas/electric rooftop and ground-mount units — verify your OEM part number on the unit data plate or control board itself before ordering. Our parts specialists are available to confirm fitment prior to purchase. Order today and receive same-day shipping — get your system back online fast.