OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P403510CP

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P448P403510CP packaged unit. The DSI control board is the central brain of your system's heating operation — it sequences the inducer motor, manages spark ignition timing, monitors flame sense feedback, and controls safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockout faults, erratic burner cycling, or error codes flashing on the board's diagnostic LED. Replacing it with the factory OEM part ensures every function operates exactly to Carrier's engineered specifications.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control board | 24V control circuit compatible | Factory-matched ignition timing and lockout logic for Carrier CP48P448P403510CP packaged units
• OEM vs Generic: OEM control boards carry pre-programmed firmware and component tolerances identical to the original factory unit. Aftermarket boards can introduce timing mismatches, incompatible lockout sequences, and shortened service life — especially critical on DSI systems where ignition timing precision directly affects safe operation.
• Install Difficulty: 3/5 — Requires disconnecting 120V power and 24V control wiring from multiple terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and phone/camera to photograph all wiring harness connections before removal. Note all LED diagnostic codes from the failed board before replacement. Always de-energize the unit at the disconnect and verify power is off before handling.
• Warranty: 1-year OEM factory warranty on part. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: This board is factory-specified for the Carrier CP48P448P403510CP packaged gas/electric unit. Verify OEM part number LH33WP002 against your unit's data plate and existing board label before ordering. If you have questions about fitment, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.