{"product_id":"carrier-py3gna042090ab-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3GNA042090AB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3GNA042090AB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Direct Spark Ignition (DSI) control board for the \u003cstrong\u003eCarrier PY3GNA042090AB\u003c\/strong\u003e packaged gas\/electric unit. As the brain of the furnace section, this microprocessor-based board orchestrates the entire heating sequence — controlling the combustion process, blower and indoor fan motors, spark igniter, and gas valve, while continuously monitoring timing, trial-for-ignition cycles, flame sensing, and safety lockout conditions. When this board fails, symptoms typically include a no-heat lockout, repeated ignition attempts with no flame establishment, erratic blower behavior, or a complete system shutdown with no response to thermostat calls for heat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e LH33WP003 (also covers LH33WP003A suffix revision) | Direct Spark Ignition (DSI) type | Factory-matched for Carrier PY3GNA042090AB packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard Functions:\u003c\/strong\u003e Controls \u003cstrong\u003espark igniter sequencing\u003c\/strong\u003e, \u003cstrong\u003egas valve operation\u003c\/strong\u003e, \u003cstrong\u003eblower motor timing\u003c\/strong\u003e, and \u003cstrong\u003esafety sensor monitoring\u003c\/strong\u003e — shuts system down automatically upon detecting unsafe conditions to prevent hazards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires shutting off gas and electrical supply before servicing. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, multimeter for 24V control circuit verification. Photograph all wiring harness connections before disconnecting. Note LED fault codes on the old board before removal for diagnostics reference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the factory-specified replacement for \u003cstrong\u003eCarrier model PY3GNA042090AB\u003c\/strong\u003e. Also compatible with other Carrier, Bryant, and Payne packaged rooftop and combination units sharing the LH33WP003\/LH33WP003A board specification. Always verify your existing board's part number on the label before ordering. Our fitment team is available to confirm compatibility — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640476422515,"sku":"CARRIE-PY3GNA042090AB-CONTROL_BOARD-LH33WP003","price":367.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640476455283,"sku":"CARRIE-PY3GNA042090AB-CONTROL_BOARD-LH33WP003-GEN","price":323.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_8a62bde7-4c0a-40da-9d17-1effb7e32793.jpg?v=1775028088","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna042090ab-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}