OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048090AB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY3PEA048090AB packaged unit. As the central brain of your heating system, this board sequences the entire ignition cycle — commanding the inducer motor, gas valve, spark igniter, and flame sensing circuit in precise coordination. When this board fails, symptoms typically include a hard no-heat lockout, repeated ignition attempts with no flame establishment, erratic short-cycling, or a complete loss of heating function with no blower response. Replacing it with the genuine OEM part ensures the factory-programmed timing sequences, safety lockout logic, and fault code diagnostics are fully preserved.

• Part Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Supersedes LH33WP002A | Factory-matched for Carrier PY-series packaged units
• OEM vs Generic: Genuine Carrier OEM boards retain factory-programmed ignition timing, retry logic, and safety lockout thresholds. Aftermarket boards can introduce off-spec timing that leads to nuisance lockouts, gas valve wear, or voided equipment warranties.
• Install Difficulty: 3/5 — Requires disconnecting 120V/24V wiring harnesses and documenting terminal assignments before removal. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, multimeter for post-install verification. Recommended for qualified HVAC technicians; always disconnect power at the disconnect box before servicing.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PEA048090AB packaged gas/electric unit. Also fits select Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — verify your OEM part number on the board or unit data plate before ordering. Need fitment confirmation? Our parts specialists verify compatibility before you buy.