OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P548P503511CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P548P503511CP packaged gas/electric unit. The DSI control board serves as the brain of the heating system, managing the ignition sequence, gas valve operation, inducer motor timing, and safety lockout logic. Common failure symptoms include no-heat calls with the system entering hard lockout, intermittent ignition failures, erratic cycling, or fault codes indicating ignition board errors. Replacing this board with the correct OEM part restores factory-programmed ignition timing and safety sequences.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control type | 24V control circuit compatible | Factory-programmed ignition and lockout timing for Carrier CP48P548P503511CP packaged units
• OEM vs Generic: This OEM board carries Carrier's factory firmware and component tolerances. Aftermarket DSI boards may use non-matched ignition timing profiles, increasing the risk of nuisance lockouts, improper flame-sensing thresholds, and voided equipment warranties.
• Install Difficulty: 3/5 — Disconnect power at the disconnect box and confirm zero voltage with a multimeter before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring connections prior to removal. Transfer wiring harnesses one connector at a time to avoid miswiring. Verify all fault codes are cleared after installation.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled parts warehouse.

Compatibility: This board is factory-specified for the Carrier CP48P548P503511CP packaged unit. Always cross-reference the OEM part number LH33WP002 against the data plate or existing board label before ordering to confirm fitment. Compatible unit variants may share this board — contact our fitment team for verification if your model suffix differs. In-stock and ready to ship — get your system back online fast.