OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PNB030060AA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY2PNB030060AA rooftop unit. The DSI control board is the brain of your unit's heating system — it orchestrates spark ignition sequencing, gas valve activation, combustion blower and indoor fan motor operation, flame sensing, and safety lockout routines. When this board fails, common symptoms include a no-heat condition, the unit attempting ignition and then locking out, erratic blower behavior, or fault codes flashing on the LED indicator. Replacing this board with the correct OEM part restores full factory functionality and eliminates guesswork.

• Specs: Direct Spark Ignition (DSI) microprocessor-based control board | Controls spark igniter, gas valve, combustion blower, and indoor fan motors | Integrated LED fault-code diagnostics | Factory-matched to Carrier PY2PNB030060AA rooftop unit specifications
• OEM vs Generic: This is the genuine Carrier OEM board — not a universal aftermarket substitute. OEM boards preserve factory timing sequences, safety lockout thresholds, and diagnostic accuracy. Generic replacements may deviate from critical ignition trial timing, risking nuisance lockouts or, worse, unsafe operation.
• Install difficulty: 3/5 — Disconnect all power before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, smartphone (photograph all wiring harness connections before removal). Transfer wiring connectors one-by-one to avoid mis-wiring. A multimeter is recommended to verify 24V control circuit integrity before power-up.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered as the direct factory replacement for Carrier model PY2PNB030060AA rooftop units equipped with a Direct Spark Ignition heating system. Always cross-reference your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.