OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P348P303510CP

This is the factory OEM Direct Spark Ignition (DSI) control board, part number LH33WP002, designed as the exact replacement for the Carrier CP48P348P303510CP packaged gas/electric unit. The DSI control board orchestrates the entire ignition sequence — managing the inducer motor, spark igniter, gas valve, and flame verification — in precise timed stages. When this board fails, the unit may experience hard lockout, repeated ignition attempts with no flame, failure to call for heat, or erratic cycling that no amount of thermostat adjustment will resolve.

• 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 Carrier OEM board — not an aftermarket substitute. OEM boards carry factory-calibrated ignition timing, correct fault-code LED sequences, and full compatibility with Carrier's proprietary safety lockout protocols. Aftermarket boards frequently suffer from mistimed ignition windows and missing fault diagnostics that can leave technicians chasing phantom failures.
• Install Difficulty: 3/5 — Requires disconnecting 24V low-voltage wiring harness and line-voltage connections. Always shut off gas supply and disconnect power at the disconnect box before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, smartphone to photograph all wiring connections prior to removal. Recommended for qualified HVAC technicians or experienced DIYers familiar with gas appliance safety.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our stocked warehouse — no waiting on special orders.

Compatibility: Engineered specifically for the Carrier CP48P348P303510CP packaged unit. Always cross-reference OEM part number LH33WP002 against your unit's data plate and existing board labeling before installation. If you need fitment confirmation, our HVAC parts specialists are available to verify compatibility before you order — no guesswork, no costly returns.