OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA042060AB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board (part number LH33WP002), factory-specified for the Carrier PY3PEA042060AB packaged unit. The DSI control board is the command center of the heating section — it sequences the ignition trial, monitors the flame sensor signal, manages safety lockouts, and coordinates the inducer, gas valve, and blower outputs. When this board fails, common symptoms include a no-heat condition, repeated ignition lockout faults, failure to advance past the inducer pre-purge stage, or erratic heating cycles that cannot be resolved by resetting the thermostat.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Also supersedes legacy part LH33WP002A | Factory-matched timing sequences and safety thresholds
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards preserve exact ignition trial timing, lockout logic, and flame-sense sensitivity that generic boards frequently miscalibrate, risking nuisance lockouts or unsafe ignition behavior.
• Install difficulty: 3/5 — Requires disconnect of 120V/24V wiring harnesses and careful terminal labeling before removal. Recommended tools: flathead and Phillips screwdrivers, needle-nose pliers, phone camera for wiring photos, multimeter for pre-install voltage verification. A qualified HVAC technician is strongly recommended for this repair.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PEA042060AB packaged gas/electric unit. Also fits a wide range of Carrier 48-series commercial packaged units — verify your unit's data plate and existing part number before ordering. Our parts specialists are available to confirm fitment at no charge before you buy.