{"product_id":"carrier-fc4dnf018005aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 24V for FC4DNF018005AAAA — HT01CN241","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FC4DNF018005AAAA (Part# HT01CN241)\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer is the factory-specified unit for the \u003cstrong\u003eCarrier FC4DNF018005AAAA\u003c\/strong\u003e fan coil. The transformer steps down 120V line voltage to the 24V signal that powers your control board, thermostat, and all low-voltage switching circuits. When it fails, the entire control circuit goes dark — your thermostat goes blank, the system becomes completely unresponsive, and no heating or cooling function can be initiated. Replacing it with the correct OEM part (HT01CN241) restores proper voltage output and protects downstream components from voltage irregularities.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM Part# HT01CN241 | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and winding tolerances. Undersized or off-brand transformers can sag under load, causing erratic thermostat behavior, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and disconnect block before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after install. Photograph all wiring connections before removal.\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\u003eFC4DNF018005AAAA\u003c\/strong\u003e fan coil unit. Always verify your unit's data plate voltage requirements and VA rating before ordering. Our team is available to confirm fitment prior to purchase — don't guess on a control circuit component.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909523886451,"sku":"CARRIE-FC4DNF018005AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909523919219,"sku":"CARRIE-FC4DNF018005AAAA-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_cfee814a-6e6f-4187-9b16-0d14de8e3ef5.jpg?v=1782942544","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fc4dnf018005aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}