{"product_id":"carrier-fa4cnf024010aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FA4CNF024010AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model FA4CNF024010AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FA4CNF024010AAAA\u003c\/strong\u003e air handler. The transformer steps down line voltage from 120V to the 24V AC signal that powers your control board, thermostat, and all low-voltage control circuits. When the transformer fails, the entire control circuit loses power — resulting in a completely unresponsive thermostat, a blank display, or a system that refuses to call for heating or cooling despite a functioning power supply.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01CN241 | Direct plug-and-play replacement with factory-matched mounting footprint and wire leads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage tolerances, ensuring stable 24V output under full control-circuit load. Undersized or off-tolerance generic units can cause 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 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Note wire lead colors or photograph connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 specifically for the Carrier \u003cstrong\u003eFA4CNF024010AAAA\u003c\/strong\u003e fan coil air handler. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909548691827,"sku":"CARRIE-FA4CNF024010AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909548724595,"sku":"CARRIE-FA4CNF024010AAAA-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_561df5d9-4a3a-46eb-a9fa-9b337f621a1e.jpg?v=1782939484","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4cnf024010aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}