{"product_id":"carrier-fb4cnps30l00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FB4CNPS30L00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FB4CNPS30L00AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FB4CNPS30L00AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, the system becomes completely unresponsive, and no heating or cooling can be initiated. A failed transformer is one of the most common causes of a completely dead HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Single-phase | OEM part number HT01CN241 | Factory-matched output tolerance for stable control voltage\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. Undersized or off-tolerance generic transformers can cause nuisance tripping of the control fuse, erratic thermostat behavior, and premature control board failure — costing far more than the transformer itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the air handler before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring connections before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.\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 and factory-specified for the Carrier \u003cstrong\u003eFB4CNPS30L00AAAA\u003c\/strong\u003e fan coil air handler. Always verify the OEM part number HT01CN241 against your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909532766579,"sku":"CARRIE-FB4CNPS30L00AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909532799347,"sku":"CARRIE-FB4CNPS30L00AAAA-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_1536c2f6-6bd9-43f1-929d-80a4918370a9.jpg?v=1782940954","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4cnps30l00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}