OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PNB060090AA

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier PY2PNB060090AA packaged rooftop unit. As the brain of your heating system, the DSI control board manages the complete ignition sequence — from spark ignition and gas valve activation to blower motor staging, flame sensing, and safety lockout. When this board fails, common symptoms include a no-heat condition, repeated ignition lockout faults, erratic blower behavior, or the unit cycling off immediately after startup with no flame established.

• Specs: Direct Spark Ignition (DSI) microprocessor-based control | Integrated Circuit Board (ICB/IGC) | Controls combustion air, spark igniter, gas valve, blower, and indoor fan motors | Onboard LED fault-code diagnostics for rapid troubleshooting | OEM Part Number: LH33WP003
• OEM vs Generic: This is a factory-original Carrier OEM board engineered to exact design specifications for the PY2PNB060090AA. Generic or aftermarket boards may not replicate precise ignition timing windows, flame-sensing sensitivity thresholds, or lockout sequencing — risking nuisance faults or unsafe operation. OEM is always the recommended choice for commercial rooftop applications.
• Install difficulty: 3/5 — Requires shutting off gas supply and disconnecting 24V and line-voltage wiring harnesses. Photograph or label all connectors before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Recommend a qualified HVAC technician for commercial rooftop units.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse — order by 3 PM local time.

Compatibility: Engineered as the direct factory replacement for Carrier model PY2PNB060090AA packaged rooftop gas/electric units. Always verify OEM part number LH33WP003 against your unit's wiring diagram and data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your unit back online fast.