OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PNB030060AAAA

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY1PNB030060AAAA rooftop and packaged heating unit. The LH33WP003 serves as the brain of your system's combustion cycle — sequencing spark ignition, activating the gas valve, managing the blower and indoor fan motors, and continuously monitoring the flame sensor for safe operation. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockout after failed spark attempts, blower running without heat, or the unit cycling off immediately after startup. Onboard LED diagnostic indicators make fault-code identification fast for service technicians.

• Part Type: Direct Spark Ignition (DSI) Integrated Control Board | OEM Part# LH33WP003 | Fits Carrier PY1PNB030060AAAA packaged/rooftop gas heating units
• OEM vs Generic: This is a genuine Carrier OEM board manufactured to original design specifications, ensuring full pin-for-pin compatibility, correct timing sequences, and preserved system safety interlock behavior. Aftermarket boards may introduce timing mismatches that cause nuisance lockouts or void equipment warranties.
• Install Difficulty: 3/5 — Disconnect power and gas before servicing. Label all harness connectors before removal. Tools needed: ¼" and 5/16" nut drivers, needle-nose pliers, multimeter for voltage verification. Confirm all connectors are fully seated before restoring power. Recommend qualified HVAC technician for gas appliance board replacement.
• 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 PY1PNB030060AAAA packaged rooftop gas/electric unit. Verify your existing board's part number on the label before ordering — this board also cross-references Carrier LH33WP003A. Not sure it fits? Our HVAC parts specialists verify fitment before you buy. Order now and ship today.