OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRAY600

This is the genuine OEM Direct Spark Ignition (DSI) Control Board for the Carrier TCHC2550HECMRAY600. The DSI control board is the brain of the heating sequence — it manages the ignition spark, monitors flame presence, sequences the gas valve, and governs safety lockout logic. When this board fails, common symptoms include a unit that attempts ignition but immediately locks out, intermittent or no-heat calls, continuous ignition sparking with no flame establishment, or fault codes indicating ignition failure on the system's diagnostic LED.

• Specs: Direct Spark Ignition (DSI) control architecture | OEM part number LH33WP002 | Factory-programmed timing and lockout sequences | Plug-and-play wiring harness connections matched to TCHC2550HECMRAY600
• OEM vs Generic: This is a genuine Carrier OEM board with factory-calibrated ignition timing, safety lockout thresholds, and flame-sensing sensitivity. Aftermarket boards may use generic timing curves that cause nuisance lockouts, void equipment warranties, or fail to meet local code requirements.
• Install Difficulty: 3/5 — Requires shutting off gas and 120V power before servicing. Photograph all wiring connections and label harnesses before removal. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Recommend clearing fault history and running a full heat cycle after installation to confirm operation.
• Warranty: 1-year OEM factory warranty on parts. Orders placed before 3 PM ET ship same business day from our warehouse.

Compatibility: Engineered as the direct factory replacement for Carrier model TCHC2550HECMRAY600. Always cross-reference the part number printed on your existing board before ordering to confirm fitment — board revisions may exist across production runs. Our HVAC parts specialists are available to verify compatibility before you purchase. Order today and get same-day shipping!