{"product_id":"carrier-fx4bnb061000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FX4BNB061000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FX4BNB061000AAAA\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 FX4BNB061000AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps line voltage (120V) down to the 24V signal voltage required to power the thermostat, control board, and all low-voltage switching circuits. When the transformer fails, the entire control circuit goes dark — the thermostat loses power, the system will not respond to any calls for heating or cooling, and nothing works at all. A blown transformer is often the result of a short in the low-voltage wiring or a failed component drawing excess current, so inspect the control wiring carefully before installing this replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Class 2 transformer | Mounts directly to factory bracket in the FX4BNB061000AAAA air handler cabinet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit (HT01CN241) is wound and rated to Carrier's exact VA and insulation specifications, ensuring proper current capacity and longevity. Generic transformers may be undersized in VA rating, causing premature thermal failure under normal HVAC control loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before servicing. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter. Label all low-voltage wires 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 for the Carrier \u003cstrong\u003eFX4BNB061000AAAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — ships today when ordered before 3PM.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909487972723,"sku":"CARRIE-FX4BNB061000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909488005491,"sku":"CARRIE-FX4BNB061000AAAA-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_56c15672-9a0e-4855-a76a-f11e3470f319.jpg?v=1782939648","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4bnb061000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}