{"product_id":"carrier-fy4anf018t00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FY4ANF018T00AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V–24V for Model FY4ANF018T00AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FY4ANF018T00AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down line voltage (120V) to the 24V control voltage that powers your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dark — your thermostat shows no response, the system won't call for heating or cooling, and nothing operates despite power being present at the unit. It is often the first component to check when a system is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01CN241 | Factory-matched for Carrier FY4ANF018T00AAAA fan coil units\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 tolerances, ensuring stable 24V output under full control circuit load. Undersized or off-tolerance generic transformers can cause erratic thermostat behavior, nuisance tripping, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wiring connections before removal. Verify 24V output with a multimeter after installation before closing the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eFY4ANF018T00AAAA\u003c\/strong\u003e fan coil unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the data plate before ordering to ensure a proper fit. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909468803443,"sku":"CARRIE-FY4ANF018T00AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909468836211,"sku":"CARRIE-FY4ANF018T00AAAA-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_53a9aa2d-4ad1-4bb9-87c1-b8bf13a3d4c3.jpg?v=1782939717","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy4anf018t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}