{"product_id":"carrier-fx4dnf031008aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FX4DNF031008AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FX4DNF031008AAAA\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 FX4DNF031008AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to 24V AC, powering the thermostat, contactor coil, and all low-voltage control signals throughout the system. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing operates. It is often the first component to check when a system appears completely unresponsive despite line voltage being present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01CN241 | Factory-matched output tolerance for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine OEM Carrier transformer, manufactured to exact factory specifications. Generic transformers often underrate their true VA capacity, causing premature thermal cutout trips and nuisance lockouts under normal system load.\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, wire stripper, multimeter to confirm 24V output after installation. Label or photograph all low-voltage wiring before disconnecting from secondary terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM local time ship same business day from our climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eFX4DNF031008AAAA\u003c\/strong\u003e fan coil air handler. Always verify the transformer's VA rating and primary\/secondary voltage on your unit's data plate before ordering to ensure correct fitment. Have questions about compatibility? Our HVAC parts specialists confirm fitment before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909477388659,"sku":"CARRIE-FX4DNF031008AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909477421427,"sku":"CARRIE-FX4DNF031008AAAA-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_797197d8-c634-4629-a156-905c18333987.jpg?v=1782941207","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4dnf031008aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}