{"product_id":"carrier-py3ppa048090aa-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PPA048090AA","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PPA048090AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM \u003cstrong\u003eCarrier LH33WP003\u003c\/strong\u003e Direct Spark Ignition (DSI) Control Board, the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PPA048090AA\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the nerve center of your unit's heating system — it manages the spark igniter, gas valve, combustion sequence, blower motor timing, flame sensing, and safety lockout logic. When this board fails, symptoms typically include a hard lockout with no ignition attempt, the unit firing briefly then shutting down on flame-sensing failure, or a complete loss of heating with no error codes advancing past the ignition trial period.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LH33WP003 (also supersedes LH33WP003A) | Direct Spark Ignition (DSI) microprocessor-based control | Carrier OEM factory specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM board is factory-programmed with exact timing parameters for ignition trial, flame-sensing thresholds, and lockout sequencing. Aftermarket boards may use generic timing that causes nuisance lockouts, voided equipment warranties, or unsafe combustion behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect power and gas before servicing. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, multimeter, phone\/camera to document wiring harness connections. Transfer wiring harnesses one connector at a time to avoid miswiring. Verify 24V control circuit integrity after installation before restoring gas.\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 — no special-order delays.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PY3PPA048090AA\u003c\/strong\u003e packaged rooftop unit. The LH33WP003 is a common rooftop ignition control used across multiple Carrier and Bryant commercial packaged platforms — always verify your existing board's part number against the data plate before ordering. If you need fitment confirmation, our HVAC parts specialists verify compatibility before your order ships.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640354132339,"sku":"CARRIE-PY3PPA048090AA-CONTROL_BOARD-LH33WP003","price":450.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640354165107,"sku":"CARRIE-PY3PPA048090AA-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_15358afc-fc1e-4a7e-942c-e9e97f8c8e55.jpg?v=1775028203","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa048090aa-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}