OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model N6A48NG481454

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier N6A48NG481454 packaged gas/electric unit. The DSI control board is the operational brain of your heating system — it sequences the inducer motor, spark igniter, gas valve, and flame verification on every call for heat. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockout codes, failure to prove flame, erratic cycling, or a system that sparks but never lights the burner. Diagnosing a faulty DSI board early prevents cascading damage to other components such as the gas valve or heat exchanger.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control logic | 24V control circuit compatible | Factory-programmed timing sequences for ignition trial, lockout, and retry
• OEM vs Generic: This is a genuine Carrier OEM board — not a third-party substitute. OEM boards carry factory-programmed ignition timing and fault logic specific to the N6A48NG481454. Aftermarket boards may use universal timing that causes nuisance lockouts, voided warranties, or unsafe ignition delays.
• Install Difficulty: 3/5 — Requires disconnecting 24V and line-voltage connectors, labeling all wiring harnesses before removal, and verifying DIP switch or jumper settings match the original board. Recommended tools: flathead and Phillips screwdrivers, needle-nose pliers, phone camera for wiring documentation, and a multimeter to confirm 24V input before powering up. A qualified HVAC technician is recommended.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before 3 PM EST.

Compatibility: Designed and factory-specified for the Carrier N6A48NG481454 packaged unit. Verify your existing board's part number against LH33WP002 before ordering. If your data plate or existing board shows a different suffix, contact our parts team — we verify fitment at no charge before your order ships. Don't let a no-heat call wait: order now and receive fast, same-day shipping direct to your door or jobsite.