OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA060074AAWB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1REA060074AAWB packaged unit. The DSI control board serves as the command center for the entire ignition and heating sequence — it monitors the flame sensor, sequences the inducer and blower motors, manages gas valve timing, and enforces safety lockout protocols. When this board fails, symptoms typically include a complete no-heat condition, repeated ignition lockouts, error codes flashing on the board, or a furnace that starts and immediately shuts down without establishing flame.

• Part Number: LH33WP002 (superseded revision: LH33WP002A) | Direct Spark Ignition (DSI) type | 460V application | Factory OEM replacement — not a generic clone
• OEM vs Generic: OEM Carrier control boards are programmed with exact timing sequences, safety thresholds, and fault-detection logic for your unit. Aftermarket boards frequently use looser tolerances, increasing the risk of nuisance lockouts, voided equipment warranties, and unsafe ignition behavior.
• Install Difficulty: 4/5 — This repair requires comfort with low- and line-voltage wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone/camera to photograph all wiring harness connections before removal, and a multimeter to verify 24V control circuit integrity post-install. Always disconnect power at the breaker and follow all local codes.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before our same-day cutoff ship the same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY1REA060074AAWB packaged units equipped with a Direct Spark Ignition system. Confirm your existing board's part number against LH33WP002 before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.