{"product_id":"carrier-fy5bnf024010aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY5BNF024010AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF024010AAAA\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 FY5BNF024010AAAA\u003c\/strong\u003e. Its job is to step down 120V line voltage to the 24V signal voltage that powers the thermostat, contactor coil, and all low-voltage control components. When this transformer fails, the entire control circuit goes dark — your thermostat will appear dead, the system will not respond to any call for heating or cooling, and no diagnostic fault codes will display. It is one of the most commonly overlooked but fastest diagnostics in HVAC service: check for 24V at the secondary terminals before replacing any other control component.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Factory-matched for Carrier FY5BNF024010AAAA control boards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to exact VA and impedance specifications. Undersized or off-spec generic units can overheat, trip internal fuses, and damage downstream control boards — making OEM the only reliable choice for long-term system protection.\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 beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or spade connectors. Label all low-voltage wiring before removing the old 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 NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFY5BNF024010AAAA\u003c\/strong\u003e. Always confirm your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909462249843,"sku":"CARRIE-FY5BNF024010AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909462282611,"sku":"CARRIE-FY5BNF024010AAAA-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_7d50d632-809e-4733-b0ed-8f55a9c24377.jpg?v=1782941271","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf024010aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}