OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048090NA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board (part number LH33WP002), factory-specified for the Carrier PY3PEA048090NA packaged gas/electric unit. As the central brain of the heating system, this board manages the complete ignition sequence — controlling the inducer motor, gas valve, spark igniter, and flame verification circuit. When this board fails, common symptoms include a hard lockout with no ignition attempt, repeated ignition cycling without flame establishment, fault codes on the system, or a complete loss of heat with the blower still running. Replacing it with a genuine OEM board ensures all timing parameters, safety lockout thresholds, and fault detection logic match Carrier factory specifications exactly.

• Specs: Direct Spark Ignition (DSI) control | 460V application | Replaces superseded part LH33WP002A | Factory-matched timing and lockout logic for PY-series packaged units
• OEM vs Generic: OEM boards ship pre-configured to Carrier's exact ignition timing and safety lockout sequences. Aftermarket boards often use generalized firmware that can cause nuisance lockouts, improper flame sensing delays, or reduced fault protection — putting equipment and occupants at risk.
• Install difficulty: 3/5 — Disconnect all power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera (photograph all wiring harness connections before removal). Label every connector. A multimeter is recommended to verify 24V control circuit integrity after installation.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our stocked warehouse — no backorder delays.

Compatibility: Fits Carrier model PY3PEA048090NA packaged gas/electric units, as well as a broad range of Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series. Always verify the part number on your existing board's label before ordering. Our fitment team is available to confirm compatibility prior to purchase.