OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1RPA150224ADWB

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY1RPA150224ADWB packaged unit. The DSI control board orchestrates the entire ignition sequence — managing the inducer motor, spark igniter, gas valve, and flame sensing circuit in precise coordination. When this board fails, common symptoms include a no-heat condition with repeated ignition lockout, a furnace that sparks but never lights, erratic cycling, or a system that powers on but never advances past the inducer pre-purge stage. Fault codes on the board's LED may indicate flame sensor errors or ignition failures even when those components themselves are functioning correctly.

• Specs: Direct Spark Ignition (DSI) logic board | OEM Part Number LH33WP003 | Factory-matched for Carrier PY1RPA150224ADWB packaged unit | Controls inducer, gas valve, spark, and flame sense circuit
• OEM vs Generic: This is a genuine OEM Carrier board built to exact factory specifications. Aftermarket boards may lack proper flame-sense sensitivity thresholds and ignition timing logic, risking nuisance lockouts or unsafe ignition behavior.
• Install difficulty: 3/5 — Requires disconnecting 24V and line-voltage wiring harnesses and documenting all connector placements. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, phone or camera to photograph wiring before removal. Always shut off gas and disconnect power before servicing. Recommend a licensed HVAC technician for gas appliance repairs.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered as the direct factory replacement for Carrier model PY1RPA150224ADWB packaged units equipped with the DSI ignition system. Always verify the OEM part number LH33WP003 against your unit's data plate or existing board label before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required. Order today and get same-day shipping on in-stock units.