OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3GNA060130NB

This is the factory OEM Direct Spark Ignition (DSI) control board, Carrier part number LH33WP003, engineered specifically for the Carrier PY3GNA060130NB packaged rooftop unit. As the brain of the heating system, this integrated ignition control board orchestrates every stage of the combustion sequence — from spark ignition and gas valve activation to indoor blower timing, flame sensing, and safety lockout. When this board fails, the most common symptoms are a no-heat condition, repeated ignition lockout faults, the unit starting then shutting down within seconds, or a complete failure to initiate a heating cycle.

• Part Specifications: Carrier OEM Part # LH33WP003 | Direct Spark Ignition (DSI) type | Microprocessor-based integrated ignition control (IGC) | Status LED fault code indicators for rapid field diagnostics
• OEM vs Generic: This is the genuine Carrier-manufactured board built to exact factory tolerances. Aftermarket substitutes may replicate basic functions but often lack precise timing calibration, increasing the risk of nuisance lockouts, premature failure, or voided equipment warranties.
• Install Difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before handling. Document all wiring connections with photos prior to removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter. Check for any fault codes from the old board before swapping. Recommended for qualified HVAC technicians.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PY3GNA060130NB packaged rooftop gas/electric unit. Always cross-reference the part number on your existing board's label before ordering, as board revisions (e.g., LH33WP003A) may apply. Not sure if this is the right part? Contact our HVAC parts specialists — we verify fitment before you buy.