OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB048115NBAA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1PEB048115NBAA packaged gas/electric unit. The DSI control board serves as the brain of the heating sequence — it orchestrates the spark igniter, gas valve, combustion blower, and indoor fan motor while continuously monitoring flame sensing, trial-for-ignition timing, and safety lockout logic. When this board fails, symptoms typically include a complete no-heat condition, repeated ignition lockouts, short cycling immediately after burner light-off, or error codes indicating flame sense or ignition faults. Replacing with the correct OEM board restores factory-programmed timing sequences that aftermarket boards frequently cannot replicate.

• Part Number: LH33WP002 (supersedes LH33WP002A) | Genuine Carrier OEM | Factory Authorized Part | Approx. weight: 0.66 lbs
• OEM vs Generic: OEM control boards preserve the exact microprocessor logic, lockout timing, and flame-sensing thresholds engineered for this unit. Generic or aftermarket boards may use approximated timing values, risking nuisance lockouts, unsafe ignition retries, or voided equipment warranties.
• Install Difficulty: 3/5 — Shut off gas supply and disconnect power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone camera (photograph all wiring harness connections before removal). Match connector positions exactly on reinstall. Recommend verifying gas valve and igniter function independently before condemning the board.
• Warranty: 1-year OEM factory warranty on parts. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1PEB048115NBAA packaged unit and other Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series that specify LH33WP002. Always verify your unit's data plate and wiring diagram before ordering. Not sure if this is the right board? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.