OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA090180ACWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1REA090180ACWA packaged unit. The DSI control board serves as the central intelligence of the heating system — it manages the ignition sequence, monitors flame presence, sequences the inducer and blower motors, and enforces safety lockout protocols. When this board fails, you may experience a complete no-heat condition, repeated ignition lockout faults, erratic burner cycling, or a system that sparks but never lights. Because every output on this board is safety-critical, an exact OEM replacement is strongly recommended.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Replaces legacy part LH33WP002A | Factory-matched logic and timing sequences
• OEM vs Generic: OEM DSI boards use manufacturer-calibrated ignition timing, flame-sensing thresholds, and lockout logic. Aftermarket alternatives often use generalized firmware that can cause nuisance lockouts, improper retry timing, or voided equipment warranties.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Tools needed: nut driver set, needle-nose pliers, phone or camera to photograph all connector positions before removal. Label every harness connector and match terminal-for-terminal. If fault codes are stored, record them before disconnecting power.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct drop-in replacement for the Carrier PY1REA090180ACWA packaged unit. Always verify the part number printed on your existing board before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.