OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG480108

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier N6A48NG480108 packaged gas/electric unit. The DSI control board serves as the brain of the heating system — it sequences the inducer motor, spark igniter, gas valve, and flame verification circuit in precise timed stages. When this board fails, common symptoms include a no-heat condition, repeated ignition lockout faults, failure to prove flame after a successful spark, or erratic cycling behavior that cannot be resolved by resetting the thermostat or checking the filter. Fault LED blink codes on the board itself will often confirm a control board failure versus a failed downstream component.

• Specs: Direct Spark Ignition (DSI) control | OEM Part Number LH33WP002 | 24V control circuit compatible | Factory-programmed ignition timing and lockout logic pre-loaded
• OEM vs Generic: This is a genuine OEM Carrier board with factory-calibrated ignition timing sequences, lockout retry parameters, and fault diagnostics. Aftermarket boards frequently use approximated timing values that cause nuisance lockouts or accelerated component wear on the gas valve and igniter.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone or camera to photograph all wiring harness connections prior to removal. Transfer wiring harnesses one connector at a time to avoid miswiring. Verify all interlocks are seated after installation before restoring power.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse when ordered before 3 PM local time.

Compatibility: Designed and factory-specified for the Carrier N6A48NG480108 packaged gas/electric unit. Always cross-reference the OEM part number LH33WP002 against the label on your existing control board before ordering to confirm fitment. If you are unsure, our HVAC parts team can verify compatibility before your order ships — same-day shipping available on all in-stock control boards.