OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB036090NBAA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1PEB036090NBAA packaged gas/electric unit. The DSI control board serves as the brain of the heating sequence — it manages ignition timing, monitors the flame sensor signal, sequences the inducer and blower motors, and triggers safety lockout when a fault condition is detected. When this board fails, common symptoms include a no-heat condition, repeated ignition lockout (flashing fault codes), the unit firing briefly then shutting off, or the system failing to initiate a heating cycle at all. Replacing it with the correct OEM board is the only way to guarantee factory-matched ignition timing and safety logic.

• Specs: Direct Spark Ignition (DSI) control | 460V application | Replaces superseded part LH33WP002A | Factory-matched ignition timing and safety lockout thresholds
• OEM vs Generic: OEM boards preserve the exact ignition retry timing, twinning logic, and fault code sequencing programmed for this unit. Aftermarket boards may use generic DSI algorithms that cause nuisance lockouts, incorrect fault codes, or shortened heat exchanger life due to mistimed ignition.
• Install difficulty: 3/5 — Disconnect power and gas before beginning. Label all wire harness connections with tape before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, smartphone camera for wiring reference. Recommend verifying fault codes via the board's LED indicator prior to replacement to rule out upstream causes (pressure switch, flame sensor, gas valve).
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the factory replacement for Carrier model PY1PEB036090NBAA packaged units. This board also fits a wide range of Carrier, Bryant, and Payne packaged and applied models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — verify your unit's data plate and existing part number before ordering. Our fitment specialists are available to confirm compatibility before you purchase.