OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P548P503011CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P548P503011CP packaged unit. The DSI control board serves as the central brain of the heating sequence — managing ignition timing, flame verification, gas valve operation, inducer control, and safety lockout logic. When this board fails, common symptoms include the unit failing to ignite, entering a hard lockout after repeated ignition attempts, erratic heating cycles, or a complete loss of heating function with no fault codes displayed. If your Carrier CP48P548P503011CP is cycling without producing heat or showing repeated ignition lockout faults, this board is a primary suspect.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number: LH33WP002 | Factory-matched to Carrier CP48P548P503011CP packaged unit | Controls ignition sequencing, flame sensing, gas valve, and inducer motor timing
• OEM vs Generic: This is a genuine OEM Carrier board manufactured to exact factory specifications. Aftermarket boards often lack proper timing calibration and safety lockout logic, which can cause nuisance trips, unsafe operation, or premature failure. OEM is always the recommended choice for control board replacements.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. Label every connector. Reuse the original mounting hardware and verify all harnesses click firmly into place before restoring power.
• Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day when ordered before cutoff.

Compatibility: This DSI control board is designed specifically for the Carrier CP48P548P503011CP packaged gas/electric unit. Always verify the OEM part number LH33WP002 against your unit's existing board label and data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order and we'll confirm compatibility fast.