{"product_id":"carrier-fa4cnf048000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4CNF048000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model FA4CNF048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FA4CNF048000AAAA\u003c\/strong\u003e air handler. It steps down 120V line voltage to the 24V signal voltage required by the thermostat, control board, contactor coil, and all other low-voltage components in the system. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system will not call for heating or cooling, and nothing runs. A failed transformer is often the first suspect when a system appears completely dead despite having power at the disconnect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01CN241 | Factory-matched to Carrier FA4CNF048000AAAA air handler control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact factory VA specifications. Undersized or off-tolerance generic units can overheat under normal load, trip internal thermal fuses, and cause intermittent control failures that are difficult to diagnose.\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 beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire nuts or spade connectors. Label and photograph all low-voltage wiring before disconnecting from the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed by 3PM local time ship same business day from our HVAC-dedicated warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFA4CNF048000AAAA\u003c\/strong\u003e fan coil air handler. Always confirm the VA rating and primary\/secondary voltages on your existing transformer's label before ordering to ensure a correct fit. If you're unsure of fitment, our parts team is available to verify compatibility before you buy — no guesswork required. \u003cem\u003eIn stock and ships today.\u003c\/em\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909546332531,"sku":"CARRIE-FA4CNF048000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909546365299,"sku":"CARRIE-FA4CNF048000AAAA-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_5df3dee4-baf7-448d-8f5e-656f27fbe8c6.jpg?v=1782940881","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4cnf048000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}