OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P404010CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P448P404010CP packaged unit. The DSI control board serves as the central command module for the heating sequence — managing ignition timing, flame sensing, inducer motor operation, gas valve activation, and safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, erratic cycling, or failure to prove flame even when the igniter and flame sensor test good individually. If your Carrier packaged unit attempts ignition but never establishes a stable heat cycle, this board is a primary suspect.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control type | 24V control circuit compatible | Factory-programmed timing and lockout sequences for CP48P448P404010CP
• OEM vs Generic: This is a genuine OEM Carrier board pre-programmed with the exact ignition timing, trial period, and lockout parameters required by the CP48P448P404010CP. Aftermarket control boards often require manual DIP-switch configuration and may not replicate factory safety logic precisely, risking nuisance lockouts or, worse, unsafe operation.
• Install Difficulty: 3/5 — Requires disconnecting 120V and 24V wiring harnesses and documenting all terminal connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera for wiring documentation, multimeter for post-install verification. Always shut off power at the disconnect and confirm zero voltage before handling. Not recommended for unlicensed homeowners in jurisdictions requiring HVAC technician certification.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier CP48P448P404010CP packaged gas/electric unit. Always cross-reference OEM part number LH33WP002 and verify your existing board's part number before ordering to ensure a direct fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before your order ships — no guesswork, no returns.