OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY2PEB042090NB

This is the OEM factory-specified Direct Spark Ignition (DSI) Control Board (part number LH33WP002) for the Carrier PY2PEB042090NB packaged gas/electric unit. The DSI control board is the nerve center of the heating system — it sequences the inducer motor, manages spark ignition timing, monitors the flame sensor, and enforces safety lockout logic. When this board fails, common symptoms include a no-heat or lockout condition, repeated ignition attempts with no flame establishment, error codes indicating ignition failure, or the unit cycling on and off without completing a full heating sequence.

• Specs: Direct Spark Ignition (DSI) control | Factory-matched for Carrier PY2PEB042090NB | 24V control circuit | Integrated lockout timer and diagnostic LED output
• OEM vs Generic: This is a genuine OEM Carrier board engineered to exact factory tolerances. Aftermarket boards may lack precise timing calibration, risking nuisance lockouts, improper flame-sensing thresholds, or voided equipment warranties.
• Install difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera to photograph all wiring harness connections before disconnecting. Transfer one connector at a time to avoid mis-wiring.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PY2PEB042090NB packaged unit. Always cross-reference your unit's data plate and existing board part number against LH33WP002 before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy for complete peace of mind.