OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model LC748LCCSRLY2600

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier LC748LCCSRLY2600 packaged or split-system gas unit. The DSI control board serves as the command center for the entire ignition and heating sequence — it manages the inducer motor, spark ignition timing, gas valve activation, flame sensing, and safety lockout logic. When this board fails, common symptoms include a no-heat condition, repeated ignition lockouts, erratic cycling, or fault codes that cannot be cleared by cycling power. A failed DSI board may also prevent the blower from operating in the correct sequence, causing comfort and efficiency issues throughout the system.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control board | 24V control circuit compatible | Factory-programmed ignition timing and lockout logic pre-loaded
• OEM vs Generic: This is a genuine OEM Carrier board — factory-matched to the LC748LCCSRLY2600's exact ignition sequence, timing parameters, and safety thresholds. Aftermarket boards often require jumper adjustments and may not replicate OEM lockout timing precisely, increasing risk of nuisance trips or unsafe fault handling.
• Install Difficulty: 3/5 — Requires disconnecting 24V and line-voltage wiring harnesses and transferring any jumper configurations from the original board. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring prior to removal. Always shut off gas supply and disconnect power at the disconnect box before beginning work. Verify all fault codes and rule out flame sensor or pressure switch issues before replacing the board.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships the same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed specifically for the Carrier LC748LCCSRLY2600. Always cross-reference OEM part number LH33WP002 against your unit's data plate and existing board labeling before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — we want to make sure you get the right board the first time. Order today and receive same-day shipping on all in-stock control boards.