{"product_id":"carrier-fb4bnf036015aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V-24V for FB4BNF036015AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FB4BNF036015AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part# \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FB4BNF036015AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control system goes dark: the thermostat shows no power, the system will not respond to any calls for heating or cooling, and you may detect a burning smell or a tripped fuse on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Single-phase | Factory-matched OEM part number HT01CN241 | Replaces original transformer to exact electrical specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers use factory-grade copper windings and meet exact VA ratings. Undersized or off-brand units can overheat under load, blow the 3A control fuse repeatedly, and shorten the life of your control board.\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, wire stripper, multimeter. Confirm incoming voltage is 0V before touching terminals. Photograph all wiring connections before disconnecting the old transformer.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFB4BNF036015AAAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — same-day shipping available on all stocked parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909540303219,"sku":"CARRIE-FB4BNF036015AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909540335987,"sku":"CARRIE-FB4BNF036015AAAA-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_69ca0b29-1c03-4fad-9ec5-6de3c60a197e.jpg?v=1782939496","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4bnf036015aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}