{"product_id":"carrier-py3pna048130ab-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PNA048130AB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA048130AB\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e (part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e) for the Carrier \u003cstrong\u003ePY3PNA048130AB\u003c\/strong\u003e packaged rooftop unit. As the brain of the heating system, this microprocessor-based board orchestrates the entire ignition sequence — managing the spark igniter, gas valve, combustion blower, and indoor fan motor. It also continuously monitors flame sensing and safety timing, triggering a hard lockout if an unsafe condition is detected. Common failure symptoms include a no-heat call with no spark, repeated ignition attempts followed by lockout, erratic blower behavior, or a system that starts and immediately shuts down.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LH33WP003 (also supersedes LH33WP003A) | Factory OEM — direct-fit, no modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Controls combustion sequence, spark ignition, gas valve operation, blower\/indoor motor staging, flame sensing, trial-for-ignition timing, and safety lockout logic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect power and gas before beginning. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, phone camera (photograph all wiring harness connections before removal). Transfer wiring harnesses one connector at a time to avoid mis-wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against manufacturing defects. 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 Carrier model \u003cstrong\u003ePY3PNA048130AB\u003c\/strong\u003e packaged rooftop units. Also fits select Bryant and Day \u0026amp; Night units sharing the LH33WP003\/3A board platform — verify your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase. \u003cstrong\u003eOrder now — in stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640377987443,"sku":"CARRIE-PY3PNA048130AB-CONTROL_BOARD-LH33WP003","price":367.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640378020211,"sku":"CARRIE-PY3PNA048130AB-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_c2ee57ab-2c5c-497d-9c1c-15636fd5ab2c.jpg?v=1775028155","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna048130ab-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}