OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PPA060090AA

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier PY3PPA060090AA packaged gas/electric unit. As the brain of the heating system, this microprocessor-based board orchestrates combustion sequencing, blower and indoor motor operation, spark ignition timing, gas valve control, flame sensing, and safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, erratic burner cycling, or the unit starting then shutting down without establishing a stable flame. Replacing it with the correct OEM part restores factory-precise timing and safeguards.

• Part Number: LH33WP003 | Direct Spark Ignition (DSI) Control Board | Microprocessor-based design | Factory-matched for Carrier PY3PPA060090AA
• OEM vs Generic: This is the genuine Carrier OEM board engineered to exact factory specifications. Aftermarket boards can introduce timing mismatches in trial-for-ignition and lockout sequences, risking nuisance trips or unsafe operation. OEM ensures code-compliant, warranty-backed performance.
• Install Difficulty: 4/5 — This repair involves 24V and 120V wiring. Always shut off power at the disconnect and gas supply before beginning. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Professional installation strongly recommended.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the OEM replacement for Carrier model PY3PPA060090AA packaged units. Also cross-references to LH33WP003A. Verify your unit's data plate and existing board part number before ordering to ensure fitment. Have questions? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.