{"product_id":"carrier-py1pjb048115nbaa-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY1PJB048115NBAA","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PJB048115NBAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Direct Spark Ignition (DSI) control board for the \u003cstrong\u003eCarrier PY1PJB048115NBAA\u003c\/strong\u003e packaged rooftop unit. As the brain of the heating system, this microprocessor-based board orchestrates the entire combustion sequence — controlling the spark igniter and gas valve, managing blower and indoor fan motors, monitoring trial-for-ignition timing, performing flame sensing, and triggering safety lockout when an unsafe condition is detected. When this board fails, the most common symptoms are a complete no-heat condition, repeated ignition lockout codes, short-cycling after ignition attempts, or erratic blower behavior that cannot be resolved by resetting the system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e LH33WP003 (also supersedes LH33WP003A) | Direct Spark Ignition (DSI) type | Microprocessor-based logic control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM board — factory-programmed with exact timing, lockout, and flame-sensing parameters for the \u003cstrong\u003ePY1PJB048115NBAA\u003c\/strong\u003e. Aftermarket boards may substitute but can introduce timing variances that cause nuisance lockouts or reduce system lifespan.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring, line voltage harnesses, and gas valve leads. Document all wiring connections with photos before removal. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, multimeter. Recommended for qualified HVAC technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the factory-specified replacement for \u003cstrong\u003eCarrier model PY1PJB048115NBAA\u003c\/strong\u003e rooftop packaged units. Always verify your existing board's part number against LH33WP003 or LH33WP003A before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641011786099,"sku":"CARRIE-PY1PJB048115NBAA-CONTROL_BOARD-LH33WP003","price":368.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641011818867,"sku":"CARRIE-PY1PJB048115NBAA-CONTROL_BOARD-LH33WP003-GEN","price":324.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_d9580a88-e6bb-46d5-9a5a-f7c78fdb16f5.jpg?v=1775027866","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048115nbaa-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}