{"product_id":"carrier-py3ppa042090nb-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PPA042090NB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PPA042090NB\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM Direct Spark Ignition (DSI) control board for the \u003cstrong\u003eCarrier PY3PPA042090NB\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the nerve center of your system's heating operation — it orchestrates spark ignition, gas valve activation, combustion blower sequencing, indoor fan motor control, and continuous flame sensing. When it fails, you'll typically experience a no-heat condition, repeated ignition lockouts with no spark, a system that starts then immediately shuts down, or an unresponsive blower that never stages on. LED fault codes on the board itself can help pinpoint the exact failure mode before replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Direct Spark Ignition (DSI) Integrated Circuit Control Board | OEM Part # \u003cstrong\u003eLH33WP003\u003c\/strong\u003e | Fits Carrier PY3PPA042090NB rooftop packaged unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM board manufactured to original factory specifications. Aftermarket boards may not replicate proprietary timing sequences, flame-sensing sensitivity, or safety lockout logic — risking nuisance trips, voided warranties, or unsafe operation. OEM is always the recommended replacement for control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect power and gas before beginning. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, smartphone (to photograph all wiring harness connections before removal). Transfer all harness connectors one-by-one to avoid miswiring. Verify all safety interlocks are reconnected before restoring power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for Carrier model \u003cstrong\u003ePY3PPA042090NB\u003c\/strong\u003e. Always cross-reference your unit's data plate and existing board part number before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you buy — no guesswork required. Order today and your part ships same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640354591091,"sku":"CARRIE-PY3PPA042090NB-CONTROL_BOARD-LH33WP003","price":562.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640354623859,"sku":"CARRIE-PY3PPA042090NB-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_d27704b4-ba91-467a-bf35-d33d071bc931.jpg?v=1775028201","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa042090nb-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}