{"product_id":"carrier-fx4cnf024005aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FX4CNF024005AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FX4CNF024005AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part# \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FX4CNF024005AAAA\u003c\/strong\u003e fan coil unit. The control transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, and zone components. When this transformer fails, absolutely nothing in the control circuit responds: the thermostat goes blank, the system refuses to call for heating or cooling, and no error codes are generated because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Factory-matched for Carrier FX4CNF024005AAAA fan coil\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, ensuring proper current capacity for all connected low-voltage loads. Undersized generic units can overheat, trip internal fuses, or fail prematurely when multiple accessories are wired on the 24V circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching terminals). Photograph all wire connections before disconnecting. Reconnect matching color or label codes exactly.\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 stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFX4CNF024005AAAA\u003c\/strong\u003e fan coil unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. If your system has added accessories (humidifier, UV light, communicating thermostat), confirm total 24V load does not exceed 40VA. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909485089139,"sku":"CARRIE-FX4CNF024005AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909485121907,"sku":"CARRIE-FX4CNF024005AAAA-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_9a5c2b92-4b2b-448e-bb6d-442158ec2866.jpg?v=1782941180","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4cnf024005aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}