OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY2PEB042060AB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY2PEB042060AB packaged gas/electric unit. The DSI control board serves as the brain of the heating sequence — it manages spark ignition timing, monitors the flame sensor, controls the gas valve, and sequences the combustion and indoor blower motors. When this board fails, the unit typically enters a hard lockout after a failed ignition attempt, delivers no heat despite a call from the thermostat, or produces erratic short-cycling behavior that no amount of resetting will permanently resolve.

• Part Specs: Direct Spark Ignition (DSI) microprocessor-based control board | OEM part number LH33WP002 (supersedes LH33WP002A) | Controls combustion blower, indoor blower, spark igniter, and gas valve | Monitors ignition trial timing, flame sensing, and lockout sequences
• OEM vs Generic: This is a genuine Carrier factory part — not an aftermarket clone. OEM boards are programmed with exact timing parameters, fault codes, and safety lockout logic matched to your unit. Aftermarket boards frequently use approximate firmware that can cause nuisance lockouts, improper blower delays, or premature heat exchanger stress.
• Install Difficulty: 3/5 — Requires disconnecting 24V and 120V wiring harnesses, documenting all connector placements, and mounting the new board to the existing bracket. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers, phone/camera to photograph wiring before removal. Recommend verifying 24V transformer output before condemning the board.
• Warranty & Shipping: 1-year OEM factory warranty against defects in materials and workmanship. In stock — ships same business day when ordered before cutoff time.

Compatibility: Designed and factory-matched for the Carrier PY2PEB042060AB packaged unit. Also fits select Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — verify your model and data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.