{"product_id":"carrier-fc4bnf042005aaaa-control-board-wmmkjg","title":"OEM Carrier Fan Blower Control Board Kit 322848-751 — FC4BNF042005AAAA","description":"\u003ch1\u003eOEM Carrier Fan Blower Control Board Kit 322848-751 for Model FC4BNF042005AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM fan blower control board kit (part number \u003cstrong\u003e322848-751\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FC4BNF042005AAAA\u003c\/strong\u003e fan coil air handler. The integrated fan blower control board orchestrates all critical air handler functions — managing blower motor speed sequencing, auxiliary heat staging, and communicating with the thermostat and outdoor unit. When the board fails, common symptoms include a blower that won't start or won't shut off, intermittent system lockouts, error codes on the thermostat, loss of multi-speed fan operation, or a complete loss of heating and cooling airflow despite the outdoor unit running normally.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM part number 322848-751 | Designed for Carrier FC4BNF042005AAAA fan coil air handler | Factory-matched control logic for multi-speed blower operation | 24V control circuit interface | Includes kit hardware for direct drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier board engineered to exact factory tolerances. Generic aftermarket boards often lack model-specific firmware and timing sequences, risking improper blower ramp-up, incorrect fault codes, or premature failure of connected motors and components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 120V and 24V low-voltage wiring harnesses. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, phone or camera to photograph all wiring connections before removal. Recommended for experienced DIYers or qualified HVAC technicians. Always disconnect power at the breaker before servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This board is factory-matched for the \u003cstrong\u003eCarrier FC4BNF042005AAAA\u003c\/strong\u003e fan coil air handler. The FC4BNF series is a 3.5-ton R-410A compatible fan coil unit commonly paired with Carrier split-system heat pumps and air conditioners. Always verify your existing board's part number against \u003cstrong\u003e322848-751\u003c\/strong\u003e before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909526802803,"sku":"CARRIE-FC4BNF042005AAAA-CONTROL_BOARD-322848-751","price":156.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909526835571,"sku":"CARRIE-FC4BNF042005AAAA-CONTROL_BOARD-322848-751-GEN","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-fan-322848-751_00850e0b-5d78-430c-91e6-fe1bba020e26.jpg?v=1782916836","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fc4bnf042005aaaa-control-board-wmmkjg","provider":"National HVAC Parts","version":"1.0","type":"link"}