{"product_id":"carrier-transformer-fx4dnf025005aaaa","title":"OEM Carrier Transformer for Carrier Fan Coil Model FX4DNF025005AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer for Carrier Fan Coil Model FX4DNF025005AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier transformer is the correct low-voltage power source for the FX4DNF025005AAAA fan coil unit. It converts line voltage to the 24V control power that operates your thermostat, control board, and contactor coil, making it a critical component in every heating and cooling cycle. Transformer failure usually presents as a totally dead system — no display, no blower response, no cooling — and installing the exact Carrier part is the reliable cure. Manufactured to Carrier's original electrical and mechanical specifications, it matches the FX4DNF025005AAAA's voltage output, lead configuration, and mounting location for a true drop-in fit. The repair is a moderate DIY task: turn off power at the breaker, photograph the existing connections for reference, transfer the primary and secondary leads one at a time, and remount the transformer. Most people finish in under 30 minutes with a screwdriver and basic connectors. Avoid the risk of a mismatched generic part on your control circuit by using the OEM unit. We stock it for fast fulfillment — orders before 3PM CST ship the same day.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4DNF025005AAAA.\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":62942886396275,"sku":"carrier-transformer-fx4dnf025005aaaa","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fx_a4cbf991-02ce-4fdb-a996-b49527f98f2e.jpg?v=1781473583","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fx4dnf025005aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}