OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PNB030060NB

This is the OEM factory-specified Direct Spark Ignition (DSI) Control Board for the Carrier PY2PNB030060NB packaged heating and cooling unit. The DSI control board serves as the operational brain of the gas heating section — it sequences the inducer motor, manages spark ignition timing, monitors the flame sensor signal, and enforces safety lockout protocols. When this board fails, common symptoms include a no-heat condition, repeated ignition lockout faults, erratic burner cycling, or a complete loss of heating-stage response even when the thermostat is calling for heat.

• Specs: Direct Spark Ignition (DSI) control logic | OEM part number LH33WP003 | Factory-matched ignition timing and lockout parameters | Designed for Carrier PY2PNB030060NB packaged unit platform
• OEM vs Generic: This OEM board is pre-programmed with exact factory ignition timing, trial-for-ignition duration, and lockout reset logic specific to this platform. Aftermarket boards often require manual dip-switch configuration and may not replicate precise flame-proving thresholds, risking nuisance lockouts or unsafe operation.
• Install difficulty: 3/5 — Turn off all power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone or camera to photograph all wiring harness connections before removal. Label every connector. Board replacement typically takes 30–60 minutes for an experienced technician.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY2PNB030060NB packaged units. Always verify your existing board's part number (LH33WP003) against the unit's data plate and wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — no guesswork required. Order today and receive same-day shipping on all in-stock orders placed before 3 PM.