OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA036090NB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY3PEA036090NB packaged unit. The DSI control board is the brain of the heating system — it sequences and monitors the entire ignition cycle, from inducer startup and pressure switch proving through spark ignition and flame verification. When this board fails, common symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, failure to prove flame even when the burner lights, or error codes indicating a control board fault.

• Specs: Direct Spark Ignition (DSI) control board | OEM part number LH33WP002 | Replaces LH33WP-002 | 460V ignition control module | Factory-matched timing and lockout logic for Carrier packaged systems
• OEM vs Generic: OEM DSI boards use factory-calibrated ignition timing, trial-for-ignition duration, and lockout thresholds. Aftermarket boards frequently run out-of-spec timing sequences that cause nuisance lockouts, void equipment warranties, and can create unsafe ignition conditions. Always choose OEM for control boards.
• Install difficulty: 3/5 — Power must be fully disconnected at the disconnect and breaker before beginning. Label or photograph all wire harness connections before removal. A multimeter is recommended to verify 24V control circuit integrity before reinstalling. Allow the board to acclimate to ambient temperature if stored in a cold environment before powering up.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered and factory-matched for the Carrier PY3PEA036090NB packaged unit. Verify your existing board's part number against LH33WP002 or LH33WP-002 before ordering. If you're unsure of fitment, our HVAC parts specialists can verify compatibility before your order ships — no guesswork required.