OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model 48NG480212

This is the genuine OEM Direct Spark Ignition (DSI) Control Board for the Carrier 48NG480212 packaged gas/electric unit. The DSI control board is the brain of your system's heating sequence — it manages spark ignition timing, monitors flame sensing, controls the inducer and blower motor staging, and executes safety lockout protocols. When this board fails, common symptoms include a furnace that won't ignite, a system stuck in lockout after repeated ignition attempts, erratic blower behavior, or a unit that attempts ignition but immediately shuts down. Replacing with the correct OEM board ensures all timing sequences and safety thresholds match factory specifications exactly.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number: LH33WP002 | Designed for Carrier 48NG480212 packaged unit | Controls ignition sequencing, blower staging, and safety lockout functions
• OEM vs Generic: OEM boards are factory-programmed with exact ignition delay, blower off-delay, and lockout timing for this unit. Generic or aftermarket boards frequently use universal timing that can void your warranty, cause nuisance lockouts, or reduce heat exchanger life due to improper blower delays.
• Install difficulty: 3/5 — Requires disconnecting 120V and 24V control wiring harnesses. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, smartphone (photograph all wiring before removal). Power down and verify voltage is absent before handling. If multiple wiring harnesses are present, label each connector prior to removal.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship the same business day from our climate-controlled warehouse.

Compatibility: This board is specifically engineered for the Carrier 48NG480212 packaged gas/electric rooftop or ground-mount unit. Always cross-reference OEM part number LH33WP002 against your unit's wiring diagram and data plate before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before every order — reach out before you buy.