{"product_id":"carrier-fy5bnf018008aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FY5BNF018008AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model FY5BNF018008AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FY5BNF018008AAAA\u003c\/strong\u003e. The transformer is the backbone of your system's low-voltage control circuit, stepping down 120V line voltage to the 24V signal that powers your thermostat, control board, contactor coil, and all safety circuits. When the transformer fails, the entire control circuit goes dark — your thermostat will be unresponsive, the system will not call for heating or cooling, and no fault codes will display because there is no power to generate them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 rated | Direct OEM replacement for part number HT01CN241 | Factory-matched to Carrier FY5BNF018008AAAA wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to exact Carrier tolerances, delivering stable 24V output under full load. Generic units often sag under peak current draw, causing nuisance lockouts 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 connectors. Test incoming 120V and confirm 24V output after install before closing the unit.\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 Engineered specifically for the Carrier \u003cstrong\u003eFY5BNF018008AAAA\u003c\/strong\u003e. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. If you have any fitment questions, our HVAC parts specialists confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909464543603,"sku":"CARRIE-FY5BNF018008AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909464576371,"sku":"CARRIE-FY5BNF018008AAAA-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_383db7ae-3379-485a-8770-b45592c637f2.jpg?v=1782939737","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf018008aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}