{"product_id":"carrier-py3pna042090aa-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA042090AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM Direct Spark Ignition (DSI) control board for the \u003cstrong\u003eCarrier PY3PNA042090AA\u003c\/strong\u003e packaged heating and cooling unit. The DSI control board is the central brain of the furnace\/heating section — it sequences the ignition trial, monitors flame sense feedback, controls the inducer and blower motor timings, and enforces safety lockout logic. When this board fails, common symptoms include a \u003cstrong\u003eno-heat condition with repeated ignition lockout\u003c\/strong\u003e, erratic burner cycling, failure to prove flame even when the igniter and flame sensor are known-good, or a complete lack of response from the heating circuit despite 24V control power being present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) control | OEM Part Number: \u003cstrong\u003eLH33WP003\u003c\/strong\u003e | Factory-matched board for Carrier \u003cstrong\u003ePY3PNA042090AA\u003c\/strong\u003e | 24V control voltage input | Integrated safety lockout and retry logic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier board — factory-programmed with the exact ignition timing, timed-off delays, and lockout sequences required by the PY3PNA042090AA. Aftermarket boards may use generic timing profiles that cause nuisance lockouts or void equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires safely disconnecting 24V and line-voltage wiring harnesses. Tools needed: ¼\" nut driver, needle-nose pliers, multimeter, and camera\/phone to photograph all connector positions before removal. Always shut off gas supply and disconnect power at the disconnect box before servicing. If uncertain, consult a licensed HVAC technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders ship same business day when placed before 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and factory-specified for \u003cstrong\u003eCarrier model PY3PNA042090AA\u003c\/strong\u003e. Verify the OEM part number LH33WP003 against your unit's wiring diagram or data label before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. \u003cstrong\u003eIn stock and ready to ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640385065331,"sku":"CARRIE-PY3PNA042090AA-CONTROL_BOARD-LH33WP003","price":193.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640385098099,"sku":"CARRIE-PY3PNA042090AA-CONTROL_BOARD-LH33WP003-GEN","price":170.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_b8324b53-45b6-4df1-8124-371c6d113feb.jpg?v=1775028138","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna042090aa-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}