{"product_id":"carrier-fy5bnf030t10aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY5BNF030T10AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF030T10AAAA\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 FY5BNF030T10AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and any zone controls. When this transformer fails, nothing in the control system responds: the thermostat goes blank, the system won't call for heating or cooling, and you may find a blown fuse on the control board. It is one of the most commonly overlooked causes of a completely unresponsive HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01CN241 | Factory-matched for Carrier FY5BNF030T10AAAA fan coil units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance generic transformers can trip thermal cutoffs, cause erratic board behavior, or fail prematurely under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify primary and secondary voltages with a multimeter after installation before restoring full power. Photograph all wiring connections before disconnecting 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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eFY5BNF030T10AAAA\u003c\/strong\u003e fan coil unit. Always confirm your unit's control circuit voltage and VA requirements on the data plate or wiring diagram before ordering. If your existing transformer shows signs of overheating or burning, inspect the control board fuse and any shorted wiring before installing the replacement. Our team is available to verify fitment — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909460283763,"sku":"CARRIE-FY5BNF030T10AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909460316531,"sku":"CARRIE-FY5BNF030T10AAAA-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_6cf40bb1-8831-4f8f-a87f-df29837b9e4e.jpg?v=1782941276","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf030t10aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}