{"product_id":"carrier-transformer-fx4dnf043000aaaa","title":"OEM Carrier Transformer for Model FX4DNF043000AAAA Air Handler 40VA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer for Model FX4DNF043000AAAA Air Handler 40VA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer is the precise replacement for the FX4DNF043000AAAA fan coil air handler. It reduces line voltage to the 24V control voltage that operates your thermostat, control board, blower relays, and contactor. Telltale signs of a failed transformer include a dead thermostat, a system that won't power up, or a control fuse that blows again and again. Built to original Carrier specifications, this part matches the VA rating and terminal configuration of the transformer that shipped in the FX4DNF043000AAAA, so it installs into the existing wiring with no rework needed. Installation difficulty is moderate and best handled by an HVAC professional: cut power at the disconnect, label the primary and secondary leads, swap the unit, and reconnect. The OEM part protects your control board and provides steady, reliable 24V output. In stock and ships same-day on orders placed before 3PM CST. Get your Carrier air handler back to full operation.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4DNF043000AAAA.\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":62942885085555,"sku":"carrier-transformer-fx4dnf043000aaaa","price":61.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fx_aeb74e38-c9b8-4812-8e86-e28374af917f.jpg?v=1781473817","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fx4dnf043000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}