OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA090180ACWB

This is the genuine OEM Direct Spark Ignition (DSI) Control Board for the Carrier PY1REA090180ACWB packaged gas/electric unit. The DSI control board is the nerve center of your system's ignition sequence — it manages spark timing, proves flame via the flame sensor circuit, controls inducer and blower motor staging, and monitors safety switches throughout every heating cycle. When this board fails, you'll typically experience a hard lockout with no ignition attempt, intermittent no-heat calls, or the system sparking but failing to sustain a flame and locking out after 3 retries.

• OEM Part Number: LH33WP002 | Supersedes: LH33WP002A | Also referenced as: 1068-12, 1068-83-129A
• OEM vs Generic: This is a genuine Carrier factory-authorized DSI board with factory-calibrated spark timing and flame-sense sensitivity thresholds. Aftermarket boards frequently ship with mismatched timing delays and lower flame-sense microamp ratings, leading to nuisance lockouts and premature failure of downstream components.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Label all wiring harness connectors before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter for post-install verification. Confirm all safety switch circuits are intact before restoring power. Professional installation recommended.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for the Carrier PY1REA090180ACWB packaged unit. Also fits select Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — verify your unit's data plate and existing board part number before ordering. In stock and ready to ship — order today for same-day dispatch.