{"product_id":"carrier-py3pna042090nb-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA042090NB\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 PY3PNA042090NB\u003c\/strong\u003e packaged unit. The DSI control board serves as the brain of your furnace or packaged gas heating system — it sequences the ignition process, monitors safety sensors (including pressure switches, limit switches, and flame sensing), and triggers a system lockout if an unsafe condition is detected. Common failure symptoms include a system that sparks but never lights, a unit that locks out after one or two ignition attempts, error codes on the board's diagnostic LED, or a complete no-heat condition with no response from the heating circuit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 24 VAC control voltage | 208\/230 VAC 60Hz system power | Direct Spark Ignition (DSI) sequence | Integrated diagnostic LED fault codes | OEM part numbers: LH33WP003 \/ LH33WP003A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM board is factory-programmed with exact ignition timing, lockout retry logic, and safety thresholds for the Carrier PY3PNA042090NB. Aftermarket boards may use generalized timing that can cause nuisance lockouts or, worse, unsafe ignition delays — always prefer OEM for gas-ignition control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires shutting off gas supply and 24V\/line-voltage power before beginning. Photograph all wiring harness connections and connector positions before removal. Tools needed: flat-head and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers. Always restore and verify gas connections before test firing. Professional installation recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and factory-matched for the \u003cstrong\u003eCarrier PY3PNA042090NB\u003c\/strong\u003e packaged gas\/electric unit. Also cross-references to LH33WP003A and ICP part number 1068-83-119A. Verify your existing board's part number on the label before ordering. Have a question about fitment? Our HVAC parts team confirms compatibility before you buy — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640383754611,"sku":"CARRIE-PY3PNA042090NB-CONTROL_BOARD-LH33WP003","price":450.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640383787379,"sku":"CARRIE-PY3PNA042090NB-CONTROL_BOARD-LH33WP003-GEN","price":396.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_3ef3e07f-76be-4363-b091-349bdf68b87e.jpg?v=1775028141","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna042090nb-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}