{"product_id":"carrier-fb4anf036010afaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FB4ANF036010AFAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model FB4ANF036010AFAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement transformer (part# \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FB4ANF036010AFAA\u003c\/strong\u003e fan coil air handler. The control transformer steps down 120V line voltage to 24V to power the low-voltage control circuit — including your thermostat, relay coils, and control board. When this component fails, the entire control circuit goes dead: your thermostat goes blank, the system makes no response to any call for heating or cooling, and in some cases a blown fuse on the control board is the first visible symptom. Replacing the transformer is the correct fix once you've confirmed the fuse and wiring are intact.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN236 | Direct drop-in fit for Carrier FB4ANF036010AFAA air handler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact VA and voltage specifications. Generic alternatives often run under-rated VA, causing thermal overload trips and premature failure — especially in systems with zone boards or multiple relay loads drawing near the 40VA limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and disconnect the low-voltage wiring before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after install. Always label wires before disconnecting. If the secondary reads 0V after install, recheck primary connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 specifically for the Carrier \u003cstrong\u003eFB4ANF036010AFAA\u003c\/strong\u003e fan coil air handler. Verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. If you have a 208\/240V primary application, do not substitute — contact our team to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you order, so you get the right part the first time.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909543743859,"sku":"CARRIE-FB4ANF036010AFAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909543776627,"sku":"CARRIE-FB4ANF036010AFAA-TRANSFORMER-HT01CN236-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-HT01CN236_745baf3e-e4b0-4bb2-b411-43266f0e366a.jpg?v=1782940887","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4anf036010afaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}