{"product_id":"carrier-fy5bnf048000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120\/240V-24V for FY5BNF048000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer HT01CN241 for Model FY5BNF048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer (part# HT01CN241) is the factory-specified replacement for the \u003cstrong\u003eCarrier FY5BNF048000AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down line voltage (120V or 240V) to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system will not respond to any calls for heating or cooling, and there is no 24V present at the board. A failed transformer is often caused by a shorted component downstream, so always inspect the control circuit for wiring faults before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V\/240V | Secondary: 24V AC output | OEM part number HT01CN241 | Direct plug-in replacement with factory-matched VA rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications, ensuring stable 24V output under full load. Generic units frequently run underrated VA, causing voltage sag that damages control boards and contactors over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify 24V output after installation before restoring full system operation.\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\u003eFY5BNF048000AAAA\u003c\/strong\u003e fan coil unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909458153843,"sku":"CARRIE-FY5BNF048000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909458186611,"sku":"CARRIE-FY5BNF048000AAAA-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_410e9b04-3d97-4999-bf46-7c69891c7f96.jpg?v=1782938583","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf048000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}