{"product_id":"carrier-control-board-fx4cnf042t00aaaa","title":"OEM Carrier Furnace Control Circuit Board for Model FX4CNF042T00AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Furnace Control Circuit Board for Model FX4CNF042T00AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier control board is the main electronic control for the FX4CNF042T00AAAA fan coil air handler, coordinating blower motor staging, fan-on\/off timing, and the safety circuit that links your thermostat to the indoor and outdoor equipment. Symptoms of a failing board include a blower that won't start, fan that runs continuously, intermittent operation, or no response to a cooling or heating call. This genuine Carrier replacement is manufactured to factory specification for the FX4CNF042T00AAAA, guaranteeing correct relay logic, terminal positions, and harness connectors so the swap is clean and reliable. Installation is moderate: shut off power at the disconnect, photograph the existing wiring, transfer each connector to the matching terminal on the new board, and remount. Confirm zero line voltage before touching any connections. Installing an OEM board rather than a universal aftermarket unit preserves correct system behavior and protects your equipment warranty. In stock now and ships same-day on orders placed before 3PM CST, with authentic Carrier OEM quality behind every board.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4CNF042T00AAAA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62942891573619,"sku":"carrier-control-board-fx4cnf042t00aaaa","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-fx4cnf042t00aaaa.jpg?v=1781469486","url":"https:\/\/nationalhvacparts.com\/products\/carrier-control-board-fx4cnf042t00aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}