OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048090NB

This is the factory-original Direct Spark Ignition (DSI) Control Board for the Carrier PY3PEA048090NB packaged gas/electric unit. The DSI control board serves as the brain of the heating sequence — managing ignition timing, flame verification, pressure switch sensing, inducer motor operation, and safety lockout logic. When this board fails, common symptoms include a system that sparks but never lights, a unit that locks out after one or two ignition attempts, erratic cycling, or a complete no-heat condition with no obvious mechanical cause. Fault codes on the board's LED indicator can help pinpoint the failure mode before replacement.

• OEM Part Number: LH33WP002 (supersedes LH33WP-002) | Direct Spark Ignition (DSI) type | Factory-matched to Carrier PY3PEA048090NB specifications | 460V ignition control module
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards retain original firmware logic, terminal placement, and safety timing sequences. Generic boards may trigger nuisance lockouts or void equipment warranties.
• Install Difficulty: 4/5 — Control board replacement requires de-energizing the unit at the disconnect, photographing all wiring harness connections before removal, and carefully transferring wires one-at-a-time. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter for 24V control circuit verification post-install. Recommend qualified HVAC technician for this repair.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY3PEA048090NB packaged units. Verify your existing board's part number against LH33WP002 or LH33WP-002 before ordering. If you have questions about fitment, our HVAC parts specialists will confirm compatibility before your order ships — no guesswork required.