{"product_id":"carrier-py2ppb042090nb-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY2PPB042090NB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PPB042090NB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e, factory-specified for the \u003cstrong\u003eCarrier PY2PPB042090NB\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the brain of your unit's heating system — it orchestrates spark ignition sequencing, gas valve activation, combustion blower operation, indoor fan staging, flame sensing, and safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, ignition lockout after a failed trial, the system starting then shutting off within seconds, or erratic blower behavior that won't resolve with a simple reset.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type \u0026amp; Specs:\u003c\/strong\u003e Direct Spark Ignition (DSI) Integrated Control Board | Microprocessor-based | Controls combustion sequencing, spark igniter, gas valve, blower motor, and indoor fan | Monitors trial-for-ignition timing, flame sensing, and safety lockout — OEM part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM board engineered to original factory design specifications, ensuring full compatibility and preserving system integrity. Aftermarket boards (e.g., ICM291) may function as drop-in replacements but can vary in fault-code behavior, LED diagnostics, and lockout timing — which matters for warranty and service records.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring, line-voltage connectors, and grounding screws. Always shut off power at the disconnect and tag out before servicing. Photograph all wire harness connections before removal. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, and a multimeter to verify 24V control power before condemning the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM manufacturer warranty against defects. In stock and ships same business day from our warehouse. Every order is verified for fitment before it leaves our facility.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePY2PPB042090NB\u003c\/strong\u003e packaged rooftop gas\/electric unit. Always cross-reference the part number on your existing board's label before ordering — variants such as LH33WP003A may apply. Not sure if this is your board? Our HVAC parts specialists will verify fitment at no charge before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640509976947,"sku":"CARRIE-PY2PPB042090NB-CONTROL_BOARD-LH33WP003","price":562.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640510009715,"sku":"CARRIE-PY2PPB042090NB-CONTROL_BOARD-LH33WP003-GEN","price":494.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_af901c59-c50d-45a7-a40d-fd4789a52d89.jpg?v=1775028062","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2ppb042090nb-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}