OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048090AA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY3PEA048090AA packaged gas/electric unit. As the brain of the heating system, this board manages the entire ignition sequence — commanding the spark igniter, monitoring flame sensing, controlling the gas valve, sequencing blower and inducer motors, and enforcing lockout timing. When this board fails, symptoms typically include a no-heat condition, repeated ignition lockout faults, erratic blower behavior, or a system that sparks but never establishes a flame.

• Specs: Direct Spark Ignition (DSI) design | 460V ignition control module | Microprocessor-based logic | Controls combustion sequencing, blower motor, gas valve, and flame sensing | Replaces legacy part LH33WP002A
• OEM vs Generic: This is a genuine Carrier factory-authorized part. OEM boards ship pre-programmed with exact timing, lockout, and retry logic matched to your unit. Aftermarket boards may use different timing tolerances that cause nuisance lockouts or accelerated component wear.
• Install difficulty: 3/5 — Disconnect power and gas before starting. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring connections prior to removal. Transfer wiring harnesses one connector at a time to avoid miswiring. Verify thermostat wiring polarity before restoring power.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff time.

Compatibility: Designed for the Carrier PY3PEA048090AA packaged unit and other Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series. Always verify your existing part number on the board's label before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required. In stock and ready to ship today.