OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG481814

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier N6A48NG481814 packaged gas unit. The DSI control board serves as the brain of your heating system — orchestrating the ignition sequence, monitoring flame presence, managing inducer and blower motor timing, and executing safety lockout protocols. When this board fails, you may experience a system that attempts ignition but locks out immediately, a furnace that won't call for heat at all, erratic blower operation, or fault codes indicating ignition or flame-sensing failures. Replacing the control board with an exact OEM unit ensures all timing sequences and safety thresholds remain factory-calibrated.

• Specs: Direct Spark Ignition (DSI) design | OEM Part Number LH33WP002 | 24V control circuit compatible | Factory-programmed ignition timing and lockout logic for Carrier N6A48NG481814 packaged units
• OEM vs Generic: OEM control boards ship pre-programmed with exact ignition trial timing, blower delay profiles, and fault detection thresholds. Generic boards often require manual DIP switch configuration and may not replicate Carrier's proprietary lockout and retry sequences, increasing risk of nuisance lockouts or unsafe operation.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera for photographing all wiring harness connections prior to removal. Label every connector before disconnecting. Reset the system after installation and run a full heating cycle to confirm proper operation.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier N6A48NG481814 packaged gas/electric unit. Verify OEM part number LH33WP002 on your existing board's label before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork, no returns. In stock and ready to ship today.