{"product_id":"carrier-fy5bnf024l00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FY5BNF024L00AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF024L00AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FY5BNF024L00AAAA\u003c\/strong\u003e. It steps line voltage down from 120V to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage control components. When this transformer fails, the entire control circuit goes dark — your thermostat shows no response, the system won't call for heating or cooling, and you may measure zero voltage at the secondary terminals. A blown transformer is often caused by a short in the low-voltage wiring or a failed component drawing excess current; always inspect the control circuit before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01CN241 | Factory-matched for Carrier FY5BNF024L00AAAA | Class 2 transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to exact factory VA ratings, ensuring stable 24V output under full control circuit load. Undersized or off-brand units can sag voltage under load, causing intermittent lockouts, erratic thermostat behavior, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Note wiring polarity and label all leads before disconnecting. Check low-voltage wiring for shorts before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eFY5BNF024L00AAAA\u003c\/strong\u003e. Verify your existing transformer's primary\/secondary voltage ratings and VA rating on the unit data plate or wiring diagram before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — same business day on in-stock items.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909462184307,"sku":"CARRIE-FY5BNF024L00AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909462217075,"sku":"CARRIE-FY5BNF024L00AAAA-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_f3f1ab39-b2bf-4888-a117-91a6be8ccfa3.jpg?v=1782939745","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf024l00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}