OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB036090AAAA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1PEB036090AAAA packaged unit. The DSI control board serves as the brain of the heating system — it sequences the ignition process by directly sparking the burner, monitors flame presence via the flame sensor, and manages the inducer, gas valve, and blower motor through each heating cycle. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockout faults, the unit sparking but failing to light, or erratic short-cycling that leaves the space without heat.

• Specs: Direct Spark Ignition (DSI) control board | OEM part number LH33WP002 | Also superseded by LH33WP002A | 460V ignition control application | Factory-matched timing and fault logic for Carrier PY1PEB036090AAAA
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards carry the exact ignition timing sequences, retry logic, and lockout thresholds programmed by Carrier engineers. Aftermarket substitutes frequently use different timing windows that result in nuisance lockouts, voided equipment warranties, or repeated service calls.
• Install Difficulty: 4/5 — Requires shutting off gas and 120V power at the disconnect before starting. Tools needed: ¼" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. Verify correct wiring polarity on flame sensor and spark electrode leads. Recommended for qualified HVAC technicians only.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse — no waiting on factory orders.

Compatibility: Designed as a direct OEM replacement for the Carrier PY1PEB036090AAAA packaged unit. The LH33WP002A is the current factory revision and is fully backward compatible. Always confirm your existing board's part number from the unit's data plate or existing board label before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your unit back up and running fast.