OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG481815

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier N6A48NG481815 packaged gas/electric unit. The DSI control board serves as the brain of the heating system — orchestrating the ignition sequence, monitoring flame presence, managing inducer and blower motor timing, and executing safety shutdowns when fault conditions are detected. Common failure symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, fault codes flashing on the board's LED indicator, or a system that sparks but immediately shuts down without establishing a flame.

• Specs: Direct Spark Ignition (DSI) control board | OEM part number LH33WP002 | 24V control circuit compatible | Factory-programmed timing sequences for inducer pre-purge, ignition trial, and blower off-delay
• OEM vs Generic: This is a genuine Carrier OEM board with factory-calibrated ignition trial timing and safety lockout logic. Aftermarket boards may use mismatched timing sequences that cause nuisance lockouts, void equipment warranties, or fail to meet safety certification requirements for your specific unit.
• 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, multimeter, smartphone for wiring photos. Photograph all connector positions and wire routing before removal. Reconnect in reverse order and cycle the system to verify proper ignition sequence.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our HVAC parts warehouse.

Compatibility: Engineered specifically for the Carrier N6A48NG481815 packaged unit. Always verify the OEM part number LH33WP002 against your unit's data plate and existing board label before ordering. If you are unsure of fitment, our technical team is available to confirm compatibility before you purchase — ensuring a correct, first-time repair. Order today and receive same-day shipping on all in-stock control boards.