{"product_id":"carrier-fy5bnf048t15aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY5BNF048T15AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model FY5BNF048T15AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eFY5BNF048T15AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down line voltage from 120V to the 24V signal required to power the control board, thermostat circuit, and all low-voltage relay coils. When this component fails, the entire control circuit goes dead — your thermostat display may go blank, the system will not respond to any commands, and nothing will turn on despite power being present at the unit. It is one of the most commonly overlooked culprits in a full system no-response diagnosis.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched impedance and VA rating for FY5BNF048T15AAAA control circuit load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specs, protecting downstream control boards from voltage fluctuations. Generic units often run undersized VA ratings, causing nuisance tripped fuses and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. Install is straightforward once the control panel cover is removed.\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\u003eFY5BNF048T15AAAA\u003c\/strong\u003e fan coil unit. Verify your existing transformer's primary\/secondary voltage and VA rating on the unit data plate or original component label before ordering. Our fitment team is available to confirm compatibility prior to purchase. Order now — in stock and ships today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909457269107,"sku":"CARRIE-FY5BNF048T15AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909457301875,"sku":"CARRIE-FY5BNF048T15AAAA-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_fb7ff3a7-44c1-44e9-abe1-106c0b034c29.jpg?v=1782941291","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf048t15aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}