OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG481822

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier N6A48NG481822 packaged gas/electric unit. The DSI control board serves as the brain of the heating system, orchestrating the complete ignition sequence — from inducer motor startup and pressure switch verification through spark ignition, flame sensing, and gas valve activation. When this board fails, common symptoms include a hard lockout with no heat, repeated ignition attempts with no flame establishment, failure to advance through the heating sequence, or diagnostic fault codes displayed on the board's LED indicator.

• Specs: Direct Spark Ignition (DSI) control | OEM Part Number: LH33WP002 | 24V control circuit input | Compatible with R-410A packaged unit platform | Factory-programmed ignition timing and lockout logic
• OEM vs Generic: This factory-original OEM board carries the exact firmware, timing parameters, and component tolerances specified by Carrier engineering. Aftermarket boards frequently ship with mismatched ignition trial periods, incorrect lockout reset logic, or incompatible fault code behavior — all of which can result in repeated service calls or voided equipment warranties.
• Install Difficulty: 3/5 — Disconnect power at the disconnect box and confirm zero voltage before proceeding. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. Transfer one connector at a time to minimize wiring errors. Restore power and verify full heat cycle before closing the unit.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered and factory-matched for the Carrier N6A48NG481822 packaged gas/electric unit. Always cross-reference OEM part number LH33WP002 against your unit's wiring diagram and data plate before ordering. If you have any questions about fitment, our HVAC parts specialists verify compatibility before your order ships — call or chat today.