OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PPB036060NBAA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY1PPB036060NBAA packaged rooftop unit. As the brain of your heating system, this integrated circuit board orchestrates every critical function — from initiating the spark ignition sequence and opening the gas valve, to managing blower and indoor fan motors, monitoring flame sensing, and executing safety lockout procedures. When this board fails, symptoms typically include a complete no-heat condition, repeated ignition lockout faults, erratic burner cycling, or a system that attempts ignition but shuts down within seconds. Fault LED codes on the board itself can confirm the diagnosis before you order.

• Part Type: Direct Spark Ignition (DSI) Integrated Control Board | OEM Part# LH33WP003 | Microprocessor-based design with onboard LED fault-code diagnostics
• OEM vs Generic: This factory-original Carrier board is built to exact OEM tolerances and firmware specifications. Aftermarket substitutes may trigger nuisance lockouts or mis-sequence safety timings — risking equipment damage and voiding manufacturer warranties.
• Install Difficulty: 3/5 — Disconnect power and gas before servicing. Label and photograph all wire harness connections prior to removal. Tools needed: nut driver set, needle-nose pliers, multimeter. Recommend verifying 24V control circuit and all safety switch continuity before condemning the board.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — get your unit back online fast.

Compatibility: Engineered for the Carrier PY1PPB036060NBAA packaged rooftop gas/electric unit. Always cross-reference your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.