{"product_id":"carrier-transformer-fx4dnf037l00acaa","title":"OEM Carrier Transformer for Model FX4DNF037L00ACAA Air Handler 40VA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer for Model FX4DNF037L00ACAA Air Handler 40VA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer is the precise replacement for the FX4DNF037L00ACAA fan coil air handler. The transformer reduces line voltage to the 24V control voltage that powers your thermostat, control board, contactor, and relays. If the air handler loses low-voltage power, the thermostat goes dark, or the control fuse keeps blowing, a failed transformer is frequently the reason. Built to original Carrier factory specifications, this part duplicates the VA rating and terminal layout of the unit installed in the FX4DNF037L00ACAA, giving you a true drop-in fit with the existing wiring. Installation is moderate and best left to a licensed HVAC technician: kill power at the disconnect, label the primary and secondary leads, remove the old transformer, and install the replacement. Selecting the OEM part protects your expensive control board and ensures consistent 24V output. In stock and ships same-day when you order before 3PM CST. Restore reliable control power to your Carrier air handler now.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FX4DNF037L00ACAA.\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":62942885183859,"sku":"carrier-transformer-fx4dnf037l00acaa","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_86a025cd-276b-46c8-b16e-8ac4198501ba.jpg?v=1781473811","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fx4dnf037l00acaa","provider":"National HVAC Parts","version":"1.0","type":"link"}