{"product_id":"carrier-transformer-fx4anf042000acaa","title":"OEM Carrier Transformer EF18BZ271 for Model FX4ANF042000ACAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer EF18BZ271 for Model FX4ANF042000ACAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine Carrier transformer (EF18BZ271) steps line voltage down to the 24V control voltage that powers the thermostat, relays, and control board in your FX4ANF042000ACAA fan coil. When a transformer fails or its internal fuse opens, the entire low-voltage control circuit goes dead: no thermostat display, no blower, and no response to a cooling call. Replacing it with the correct OEM transformer restores stable 24V power and protects sensitive control electronics from voltage problems. Built to Carrier's exact VA rating and primary\/secondary specifications, this transformer is a direct fit for the FX4ANF042000ACAA. Installation is a moderate task: shut off power at the breaker, photograph and label the primary and secondary leads, mount the new transformer, and reconnect the wiring exactly as before in about 25 minutes. Always verify the secondary reads 24V after powering up. Choosing OEM ensures the right rating and avoids overloading the control circuit. In stock and ships same-day on orders before 3PM CST, so control power is restored quickly.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4ANF042000ACAA.\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":62942896095603,"sku":"carrier-transformer-fx4anf042000acaa","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fx_3e998213-f939-4271-9a58-9307dbf8650a.jpg?v=1781473451","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fx4anf042000acaa","provider":"National HVAC Parts","version":"1.0","type":"link"}