{"product_id":"carrier-fb4cnf024l10acaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120\/24V for FB4CNF024L10ACAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model FB4CNF024L10ACAA\u003c\/h1\u003e\u003cp\u003eThis OEM transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FB4CNF024L10ACAA\u003c\/strong\u003e fan coil air handler. The transformer steps down incoming 120V line voltage to the 24V signal required by your thermostat, control board, and all low-voltage control circuit components. When this part fails, nothing in your system responds — the thermostat goes blank, the air handler won't start, and the entire control circuit goes dead. It is often the first component to inspect when a system shows zero response despite power being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Factory OEM part number HT01CN241 | Replaces worn or shorted transformers with exact-fit mounting and wiring terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact factory VA tolerances, protecting downstream control boards and thermostats. Generic units may run under-rated VA, causing overheating and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Verify primary voltage is 120V at the unit before condemning the transformer. Label all low-voltage wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eFB4CNF024L10ACAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909538435443,"sku":"CARRIE-FB4CNF024L10ACAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909538468211,"sku":"CARRIE-FB4CNF024L10ACAA-TRANSFORMER-HT01CN241-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01CN241_015b9339-d1c0-4a57-9c13-08069492b52b.jpg?v=1782938638","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4cnf024l10acaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}