OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA024060NA

This is the OEM factory-specified Direct Spark Ignition (DSI) control board for the Carrier PY3PNA024060NA packaged heating and cooling unit. The DSI control board is the brain of the heating sequence — it orchestrates the ignition trial, monitors the flame sensor signal, manages the inducer and blower motor timing, and enforces safety lockouts. When this board fails, symptoms typically include a no-heat condition, a repeated ignition lockout error, the burner lighting briefly then shutting off, or completely erratic heating cycles that cannot be resolved by thermostat adjustments alone.

• Specs: Direct Spark Ignition (DSI) board | OEM Part Number LH33WP003 | Factory-matched control logic for Carrier PY3PNA024060NA | 24V control circuit compatible | Integrated fault code diagnostics via LED indicator
• OEM vs Generic: This OEM board is programmed to exact Carrier factory timing parameters for ignition trial duration, inter-purge delays, and lockout sequences. Aftermarket boards often use generic timing profiles that can cause nuisance lockouts, shorten heat exchanger life, or void remaining equipment warranties.
• Install Difficulty: 3/5 — Requires shutting off gas supply and disconnecting 120V power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone/camera to document all wiring harness positions prior to removal. Label every connector before unplugging. Always verify proper flame sensor signal with a multimeter after installation.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY3PNA024060NA packaged units. Cross-reference part number LH33WP003 against your unit's data plate and existing board label before ordering to confirm fitment. Not sure? Our HVAC parts specialists verify compatibility before your order ships — contact us with your full model and serial number.