{"product_id":"carrier-py3gna048115ab-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3GNA048115AB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3GNA048115AB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Direct Spark Ignition (DSI) control board for the \u003cstrong\u003eCarrier PY3GNA048115AB\u003c\/strong\u003e packaged gas\/electric unit. As the brain of the heating system, \u003cstrong\u003ethe LH33WP003 control board\u003c\/strong\u003e manages and sequences every critical heating function — it fires the spark igniter, opens the gas valve, monitors the flame sensor, and controls both the blower and inducer motors. When this board fails, common symptoms include hard lockout after an ignition attempt, a furnace that starts briefly then shuts down, a blower that runs continuously or not at all, or a completely unresponsive unit with no call-for-heat response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number \u0026amp; Type:\u003c\/strong\u003e OEM Carrier LH33WP003 | Direct Spark Ignition (DSI) Microprocessor-Based Control Board | Also supersedes LH33WP003A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The genuine Carrier LH33WP003 uses factory-calibrated timing sequences for trial-for-ignition and lockout — critical tolerances that aftermarket boards may not replicate exactly, risking nuisance lockouts or unsafe gas valve timing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Shut off gas supply and 120V power before beginning. Photograph all wiring harness connections before removal. Tools needed: 1\/4\" nut driver, Phillips screwdriver, needle-nose pliers. Note all DIP switch or jumper settings on the old board before swapping. Verify operation through a full heat cycle after installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PY3GNA048115AB\u003c\/strong\u003e packaged unit. This board is a common rooftop and packaged-unit DSI ignition control also found across Carrier, Bryant, and Payne platforms sharing the same ignition architecture. Always verify your existing part number on the board label before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640472686963,"sku":"CARRIE-PY3GNA048115AB-CONTROL_BOARD-LH33WP003","price":379.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640472719731,"sku":"CARRIE-PY3GNA048115AB-CONTROL_BOARD-LH33WP003-GEN","price":333.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_b0ce2cae-71cb-4e7c-8a9d-03dc17b3db8f.jpg?v=1775028093","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna048115ab-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}