{"product_id":"carrier-py1pjb048130nbaa-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY1PJB048130NBAA","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PJB048130NBAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e for the \u003cstrong\u003eCarrier PY1PJB048130NBAA\u003c\/strong\u003e packaged rooftop unit. As the brain of the heating sequence, this microprocessor-based board orchestrates the entire combustion cycle — energizing the spark igniter and gas valve, controlling the blower and indoor motors, monitoring trial-for-ignition timing, validating flame sensing, and executing safety lockout if an unsafe condition is detected. When this board fails, symptoms typically include: no heating response, repeated ignition lockout faults, erratic blower behavior, or the unit shutting down immediately after a heat call.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e LH33WP003 (also supersedes LH33WP003A) | Factory-specified replacement for Carrier PY1PJB048130NBAA rooftop packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Microprocessor-based DSI board — controls spark ignition, gas valve sequencing, combustion blower, indoor fan motor, flame sensing, and safety lockout logic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM board is programmed to exact factory timing and lockout parameters for your unit. Aftermarket boards (e.g., ICM291) may require jumper configuration and can introduce timing variances — OEM is always the zero-risk fitment choice for commercial rooftop applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect power at the disconnect box before beginning. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, phone camera (photograph all wiring harness connections before removal). Transfer connectors one at a time to avoid mis-wiring. Verify 24V control power at transformer before condemning the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PY1PJB048130NBAA\u003c\/strong\u003e packaged rooftop unit. This board is also referenced across compatible Carrier, Bryant, and Day \u0026amp; Night rooftop platforms using the LH33WP003\/LH33WP003A ignition control. Always verify your existing board's part number against LH33WP003 before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641008869747,"sku":"CARRIE-PY1PJB048130NBAA-CONTROL_BOARD-LH33WP003","price":367.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641008902515,"sku":"CARRIE-PY1PJB048130NBAA-CONTROL_BOARD-LH33WP003-GEN","price":323.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_9af76a7f-f18b-455d-bec3-4ce11c55b807.jpg?v=1775027874","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048130nbaa-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}