OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P404011CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P448P404011CP packaged gas/electric unit. The DSI control board is the brain of your system's heating sequence — it manages ignition timing, monitors flame sensing, sequences the inducer and blower motors, and triggers safety lockout when a fault is detected. Common failure symptoms include the unit entering a hard lockout with no ignition attempt, intermittent no-heat calls, error codes indicating ignition failure, or the system repeatedly cycling without establishing flame.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number: LH33WP002 | Factory-matched to Carrier CP48P448P404011CP packaged unit | Controls ignition sequencing, flame monitoring, blower timing, and safety lockout logic
• OEM vs Generic: This is a genuine OEM Carrier board manufactured to exact factory specifications. Generic aftermarket boards may not replicate proprietary timing sequences or fault logic, risking repeated lockouts, improper blower delays, and voided equipment warranties — always choose OEM for control boards.
• Install difficulty: 4/5 — Control board replacement requires shutting off all power and gas supply before beginning work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. We strongly recommend a qualified HVAC technician perform this repair, as incorrect wiring can damage the new board immediately upon startup.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: This DSI control board is the direct OEM replacement for Carrier model CP48P448P404011CP packaged heating and cooling units. Always verify your existing board's part number (LH33WP002) against your unit's data plate and wiring diagram before ordering. Not sure if this is the right board? Our HVAC parts specialists verify fitment before every order — reach out before you buy.