{"product_id":"carrier-py3pna048115ab-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115AB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA048115AB\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 PY3PNA048115AB\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the central intelligence of your gas heating system: it orchestrates spark ignition, gas valve activation, combustion blower sequencing, indoor fan motor staging, and real-time flame sensing. When this board fails, you'll typically experience a hard lockout after a failed ignition attempt, a unit that starts briefly then shuts down, erratic blower behavior, or a completely non-responsive heating system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Specs:\u003c\/strong\u003e OEM Part# LH33WP003 | Direct Spark Ignition (DSI) microprocessor-based integrated circuit board | Factory-matched to Carrier PY3PNA048115AB | Includes LED status indicator for fault code diagnostics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The genuine Carrier LH33WP003 is engineered to exact factory specifications, ensuring precise ignition timing, flame-sensing thresholds, and motor staging sequences. Aftermarket boards may exhibit timing drift or incompatible lockout logic — risking repeat service calls and compounding warranty issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring, line-voltage motor leads, and gas valve terminals. Always power down the unit at the disconnect and tag out before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring harnesses before disconnecting. Recommend professional installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 for the \u003cstrong\u003eCarrier PY3PNA048115AB\u003c\/strong\u003e packaged rooftop unit. This board controls combustion, blower and indoor motors, spark ignition, gas valve operation, and flame sensing with full safety lockout protection. Verify your existing board's part number on the unit's data plate before ordering. Have a question about fit? Our HVAC parts specialists verify compatibility before you order — call or chat today and we'll ship same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640379560307,"sku":"CARRIE-PY3PNA048115AB-CONTROL_BOARD-LH33WP003","price":562.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640379593075,"sku":"CARRIE-PY3PNA048115AB-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_b79dbd99-0433-4b23-90d0-3a7fd877ca3b.jpg?v=1775028149","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna048115ab-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}