OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1RPA060074AAWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY1RPA060074AAWA packaged rooftop unit. The DSI control board is the operational nerve center of your unit's heating system — it manages spark ignition sequencing, gas valve activation, combustion blower and indoor fan motor timing, flame sensing, and safety lockout logic. When this board fails, symptoms typically include a no-heat condition, repeated ignition lockout faults, the unit short-cycling after ignition attempts, or status LED fault codes indicating a control board error. Replacing with the correct OEM board restores factory-programmed timing sequences and full diagnostic capability.

• Part Type: Direct Spark Ignition (DSI) Integrated Furnace Control (IFC) Board | OEM Part # LH33WP003 | Manufacturer: Carrier
• OEM vs Generic: This genuine Carrier OEM board preserves factory-programmed ignition timing, flame-sensing thresholds, and lockout logic. Aftermarket boards (e.g., ICM291) may substitute but can introduce timing variances that affect efficiency and may not support all onboard diagnostic LED fault codes specific to this model.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera for wiring documentation. Photograph all connector positions before removal. Swap connectors one-by-one to avoid miswiring. Cycle power and verify LED status code after install.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1RPA060074AAWA packaged rooftop gas/electric unit. Also fits select additional Carrier and Bryant rooftop models that use the LH33WP003 DSI control board — verify your unit's existing board part number against your data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase.