OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P405510CP

This is the OEM factory-specified Direct Spark Ignition (DSI) control board for the Carrier CP48P448P405510CP packaged unit. The DSI control board is the brain of your system's ignition sequence — it manages spark timing, flame sensing, gas valve operation, and safety lockout logic. When this board fails, common symptoms include repeated ignition lockouts, no-heat calls that never complete, intermittent sparking with no flame establishment, or a system that powers on but never advances past the ignition stage. Replacing it with a genuine OEM board ensures all factory timing sequences and safety thresholds are preserved exactly as engineered.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) type | 24V control circuit compatible | Factory-matched timing and lockout logic for Carrier CP48P448P405510CP packaged units
• OEM vs Generic: Genuine OEM boards carry exact firmware and component ratings for your unit. Aftermarket boards may use approximate relay and timing specs that can cause nuisance lockouts, improper flame sensing, or voided equipment warranties — especially critical in a DSI application where ignition timing is precisely calibrated.
• Install Difficulty: 3/5 — Disconnect power and gas supply before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter for verification. Photograph all wiring harness connections before removal. Label each connector — DSI boards typically have multiple low-voltage and line-voltage terminals that must be reconnected correctly.
• Warranty: 1-year OEM manufacturer warranty. Orders placed by 3 PM ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier CP48P448P405510CP packaged unit. Always cross-reference OEM part number LH33WP002 against your unit's data plate and existing board label before ordering. If you have any fitment questions, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.