{"product_id":"carrier-fy5bnf030l00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FY5BNF030L00AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF030L00AAAA\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 FY5BNF030L00AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down line voltage from 120V 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 loses power, the system won't respond to calls for heating or cooling, and nothing turns on. A blown transformer is often caused by a shorted control board, a wiring fault, or a failed secondary load — always inspect the low-voltage circuit before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01CN241 | Factory-matched for Carrier FY5BNF030L00AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact factory VA and voltage specifications. Generic transformers may fall short of rated VA output under load, causing nuisance trips, erratic thermostat behavior, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Test primary and secondary voltages after installation before restoring power to the full system.\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 specifically for the Carrier \u003cstrong\u003eFY5BNF030L00AAAA\u003c\/strong\u003e fan coil unit. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909460775283,"sku":"CARRIE-FY5BNF030L00AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909460808051,"sku":"CARRIE-FY5BNF030L00AAAA-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_979ae4dc-1837-45ca-b457-462b38f169da.jpg?v=1782939757","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf030l00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}