{"product_id":"carrier-fx4cnb048t00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FX4CNB048T00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FX4CNB048T00AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier FX4CNB048T00AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps incoming 120V line voltage down to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the system goes completely silent: no fan, no cooling, no response from the thermostat. A blown fuse on the control board or a burning smell near the air handler are common indicators that the transformer has shorted or overloaded.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | Factory-matched impedance for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under normal load, tripping thermal protection and causing intermittent lockouts — OEM eliminates that risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade terminals, multimeter. Label all wiring connections before removal to simplify reinstallation.\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 as a direct OEM replacement for the Carrier \u003cstrong\u003eFX4CNB048T00AAAA\u003c\/strong\u003e 4-ton fan coil air handler. Always verify your existing transformer's VA rating and primary\/secondary voltage on the unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909486498163,"sku":"CARRIE-FX4CNB048T00AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909486530931,"sku":"CARRIE-FX4CNB048T00AAAA-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_0d43ae73-741d-4cc0-8898-d6da5f57f7fd.jpg?v=1782941170","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4cnb048t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}