{"product_id":"carrier-transformer-fx4cnb042000aaaa","title":"OEM Carrier Transformer for Fan Coil Model FX4CNB042000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer for Fan Coil Model FX4CNB042000AAAA\u003c\/h1\u003e\n\u003cp\u003eRestore reliable control power to your Carrier FX4CNB042000AAAA fan coil with this genuine OEM transformer. The transformer converts incoming line voltage to the 24-volt power that drives the thermostat, control board, and contactor. A burned-out or buzzing transformer often shows up as a blank thermostat, a system that won't start, or breakers and fuses that keep tripping. This factory replacement matches the original VA rating and primary\/secondary voltages, so it drops in without guesswork and runs cool under normal load. Engineered to Carrier specs, it delivers steady low-voltage output and shields sensitive electronics from spikes. The install is a moderate task for a handy homeowner or pro: kill the power, note the wiring, swap leads to the new transformer, mount it, and restore power—typically 20 to 30 minutes. Choosing the OEM part guarantees correct fit and dependable performance over universal alternatives. We keep this part in stock and ship same-day on orders placed before 3PM CST.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4CNB042000AAAA.\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":62942893965683,"sku":"carrier-transformer-fx4cnb042000aaaa","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fx_a29d645f-1155-4561-952e-e338178aea84.jpg?v=1781473632","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fx4cnb042000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}