{"product_id":"carrier-fc4cnf048000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FC4CNF048000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FC4CNF048000AAAA\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 FC4CNF048000AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down 120V line voltage to the 24V signal required to power the thermostat, control board, and all low-voltage switching components. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any commands, and no heating or cooling function is possible. It is often the first component to inspect when a system is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01CN241 | Factory drop-in fit for FC4CNF048000AAAA 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 board. Undersized or off-spec generic units can overload under peak demand, causing nuisance trips or premature failure of downstream components including the control board itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify primary and secondary voltage with a multimeter after installation before restoring full power. Always label wires before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eFC4CNF048000AAAA\u003c\/strong\u003e fan coil unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our fitment team is available to verify compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909525262707,"sku":"CARRIE-FC4CNF048000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909525295475,"sku":"CARRIE-FC4CNF048000AAAA-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_60d59d83-d952-4041-8ff3-418fe9ea85cb.jpg?v=1782939558","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fc4cnf048000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}