OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6D48NG480104

This is the OEM factory-specified Direct Spark Ignition (DSI) Control Board for the Carrier N6D48NG480104 packaged gas unit. The DSI control board is the brain of the heating system — it sequences the inducer motor, spark igniter, gas valve, and flame verification circuit. When it fails, common symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, fault codes on the board's LED indicator, or a system that sparks but never opens the gas valve. Replacing the control board with the correct OEM part restores factory-programmed timing, safety lockout thresholds, and diagnostic functionality that generic boards often cannot replicate.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) board | 24V control circuit | Compatible with single-stage gas heat sequencing | Onboard LED fault diagnostics
• OEM vs Generic: This OEM board is programmed with Carrier's exact ignition trial timing, inter-purge delays, and lockout retry logic. Aftermarket control boards frequently use generic timing profiles that can cause nuisance lockouts, void equipment warranties, or fail safety inspections.
• Install Difficulty: 3/5 — Disconnect power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. Label all connectors. A multimeter is recommended to verify 24V to the board before condemning the part.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier N6D48NG480104 packaged gas/electric unit. Always cross-reference OEM part number LH33WP002 against your unit's wiring diagram and data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before every order — contact us before you buy.