OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG481879

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier N6A48NG481879 packaged gas unit. The DSI control board is the central command module that sequences every stage of the heating cycle — managing inducer startup, spark ignition timing, gas valve operation, flame proving, and safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, error fault codes, failure to advance past the inducer stage, or erratic heating behavior that cannot be traced to any single downstream component.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number: LH33WP002 | 24V control circuit compatible | Factory-programmed ignition timing and lockout sequences pre-loaded
• OEM vs Generic: This is a genuine OEM Carrier board programmed with the exact ignition timing, retry logic, and fault diagnostics required for the N6A48NG481879. Aftermarket boards often use generic programming that can cause nuisance lockouts, void equipment warranties, and fail to communicate correctly with OEM pressure switches and gas valves.
• Install Difficulty: 3/5 — Board replacement requires disconnecting 120V and 24V wiring harnesses, documenting all terminal connections before removal, and transferring any DIP switch settings from the original board. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera for wiring documentation, and a multimeter to verify 24V control voltage before reinstalling the panel.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier N6A48NG481879 packaged gas unit using OEM part number LH33WP002. Always cross-reference the part number on your existing board before ordering, as similar Carrier packaged units may use different DSI board variants. Need fitment confirmation? Our HVAC parts specialists verify compatibility before your order ships — no guesswork, no returns.