OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA042060NB

This is the factory OEM Direct Spark Ignition (DSI) Control Board for the Carrier PY3PEA042060NB packaged unit. The DSI control board serves as the brain of your system's heating sequence — it manages spark ignition timing, monitors flame presence, sequences the gas valve and blower motor, and executes safety lockouts when abnormal conditions are detected. When this board fails, common symptoms include a system stuck in hard lockout, repeated ignition attempts with no flame establishment, blower running without heat, or complete loss of heating function. Replacing it with the correct OEM board restores factory-programmed ignition timing and safety logic.

• OEM Part Number: LH33WP002 | Direct Spark Ignition (DSI) Control Board | Factory-original Carrier component — no programming required
• OEM vs Generic: OEM DSI boards use manufacturer-calibrated ignition timing and safety lockout thresholds. Generic aftermarket boards may use looser tolerances, risking nuisance lockouts or, more critically, unsafe ignition sequences that shorten heat exchanger life.
• Install Difficulty: 3/5 — Requires disconnecting 24V and line-voltage wiring harnesses and documenting all terminal connections before removal. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, phone/camera for wiring photo, multimeter for post-install verification. Always shut off gas supply and 120V power before beginning.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Verified factory fit for Carrier PY3PEA042060NB packaged heating and cooling units. Cross-references LH33WP-002. Confirm your existing board's part number against the unit data plate before ordering. Not sure? Contact our HVAC parts specialists — we verify fitment before you buy.