OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PPB030060AAAA

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY1PPB030060AAAA packaged unit. The DSI control board acts as the central brain of the heating system — sequencing the induced draft blower, managing spark ignition timing, monitoring the flame sensor signal, and triggering safety lockouts when fault conditions are detected. Common failure symptoms include ignition lockout after repeated spark attempts, no-heat calls that produce no igniter activity, erratic burner cycling, or a furnace that starts briefly then shuts down within seconds.

• Specs: Direct Spark Ignition (DSI) logic | 24V control circuit interface | OEM part number LH33WP003 | Factory-matched timing sequences and lockout logic for the PY1PPB030060AAAA platform
• OEM vs Generic: This is a genuine OEM board programmed with Carrier's exact ignition timing, retry counts, and fault sequences. Aftermarket boards frequently ship with mismatched lockout delays or missing diagnostic LED codes, making troubleshooting harder and increasing callback risk.
• Install difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness positions before removal. Verify all plug connectors are fully seated on reinstallation and restore power only after confirming all wiring matches the original layout.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PY1PPB030060AAAA packaged unit. Always cross-reference the OEM part number LH33WP003 against your unit's original control board label before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before your purchase — no guesswork required.