OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA120180ABWB

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY1REA120180ABWB packaged unit. The DSI control board is the brain of your furnace or packaged heating system — it sequences the entire ignition cycle, monitors safety inputs (pressure switches, limit switches, flame signal), and manages inducer, igniter, and gas valve timing. When this board fails, you'll commonly experience a hard lockout with no ignition attempt, intermittent no-heat calls, a status LED fault code indicating ignition failure, or the system cycling on and off without ever establishing a flame.

• Specs: Direct Spark Ignition (DSI) control | OEM Part Number: LH33WP002 | Factory-matched for Carrier PY1REA120180ABWB | 24V control circuit compatible | Replaces original board with exact terminal layout and timing sequences
• OEM vs Generic: This is a genuine OEM Carrier board manufactured to exact factory tolerances. Aftermarket boards frequently use off-spec timing delays and mismatched flame-sense thresholds, leading to nuisance lockouts, premature component wear, and potential safety-circuit failures.
• Install Difficulty: 3/5 — Requires disconnecting 120V power and 24V control wiring. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring connections before removal. Recommend verifying fault codes via status LED before replacement to confirm board is the root cause.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.

Compatibility: This board is the direct OEM replacement for Carrier model PY1REA120180ABWB. Always cross-reference the part number on your existing board's label and confirm your unit's data plate matches before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get same-day shipping on in-stock OEM parts.