OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PPA030060NA

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier PY3PPA030060NA packaged gas/electric unit. As the brain of the heating system, this microprocessor-based board orchestrates every stage of the ignition sequence — commanding the spark igniter, opening the gas valve, verifying flame establishment via the flame sensor, and sequencing the blower and indoor motors. When this board fails, you'll typically experience a complete no-heat condition, repeated ignition lockout after one or more failed trials, erratic blower behavior, or fault LED codes with no clear resolution. Replacing it with the correct OEM board (not a mismatched generic) ensures all timing parameters, safety lockout thresholds, and motor sequencing remain factory-accurate.

• Part Number: LH33WP003 (also supersedes LH33WP003A) | Direct Spark Ignition (DSI) type | Microprocessor-based design
• OEM vs Generic: Genuine Carrier OEM boards maintain exact ignition trial timing, flame-sense sensitivity, and lockout logic. Third-party boards can introduce timing drift that causes nuisance lockouts or, worse, delayed gas valve shutoff — a safety-critical failure mode to avoid.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring, high-voltage blower leads, and multiple harness connectors. Always de-energize the unit and tag out the disconnect before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a phone camera to photograph wiring before removal, and a multimeter to verify 24V supply post-install.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Orders placed by 3 PM local time ship same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier PY3PPA030060NA packaged rooftop unit. This board also fits a range of Carrier, Bryant, and Payne commercial rooftop models that use the LH33WP003/3A DSI control platform — verify your unit's data plate and existing board part number before ordering. Not sure if this is the right board? Our HVAC parts specialists confirm fitment before you buy — contact us with your full model and serial number.