{"product_id":"carrier-fb4cnf018l00acaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FB4CNF018L00ACAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FB4CNF018L00ACAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FB4CNF018L00ACAA\u003c\/strong\u003e fan coil air handler. The transformer steps down line voltage (120V) to the 24V signal voltage required to power the thermostat, control board, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, relays won't energize, and the system produces no heating or cooling response whatsoever.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | OEM part number HT01CN241 | Designed for R-410A fan coil air handler applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory VA and voltage specifications, ensuring stable 24V output under full control board load. Undersized or off-tolerance generic transformers can cause intermittent lockouts, nuisance tripping of the secondary fuse, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and wire nuts. Always verify primary voltage and secondary output with a multimeter before restoring power. Document existing wiring with a photo prior to disconnecting leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eFB4CNF018L00ACAA\u003c\/strong\u003e fan coil air handler. Verify existing transformer VA rating and input\/output voltages on your unit's data plate before ordering to confirm fitment. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909539025267,"sku":"CARRIE-FB4CNF018L00ACAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909539058035,"sku":"CARRIE-FB4CNF018L00ACAA-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_be8934e7-86e1-40a5-9bb5-ab439ce74c70.jpg?v=1782940907","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4cnf018l00acaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}