{"product_id":"carrier-fx4cnf036000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FX4CNF036000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FX4CNF036000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FX4CNF036000AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dead: your thermostat becomes unresponsive, the system refuses to start, and no fault codes are generated because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | Rating: 40VA | OEM Part Number: HT01CN241 | Factory-matched impedance and insulation class for safe, reliable operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA ratings and insulation standards. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs prematurely, or fail to supply adequate current to the contactor coil — causing intermittent no-start faults that are notoriously difficult to diagnose.\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 (verify 24V output after install), wire stripper. Always label low-voltage wiring connections before removal and confirm primary fusing is intact on the 24V secondary side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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\u003eFX4CNF036000AAAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's input voltage (120V), output voltage (24V), and VA rating (40VA) against your unit's data plate before ordering. If your thermostat is completely unresponsive and your breaker is not tripped, this transformer is the most likely culprit. Our parts team is available to confirm fitment before you buy — order now and receive same-day shipping on in-stock units.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909482926451,"sku":"CARRIE-FX4CNF036000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909482959219,"sku":"CARRIE-FX4CNF036000AAAA-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_df30ad3c-ce0d-4370-b895-b78697150753.jpg?v=1782939656","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4cnf036000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}