{"product_id":"carrier-fa4bnf048008aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4BNF048008AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FA4BNF048008AAAA\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 FA4BNF048008AAAA\u003c\/strong\u003e fan coil air handler. Its job is to step down line voltage — typically 120V — to the 24V signal voltage that powers your thermostat, control board, relays, and zone valves. When this transformer fails, absolutely nothing in the low-voltage control circuit responds: your thermostat goes dark or unresponsive, the system refuses to start, and no error codes appear because the board itself has lost power.\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 output tolerance for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for the FA4BNF048008AAAA. Generic units often underrate their VA capacity, causing premature thermal shutoff and nuisance lockouts under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Verify secondary output reads 24–28V AC after install before restoring system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eFA4BNF048008AAAA\u003c\/strong\u003e fan coil air handler. Always confirm primary voltage on your unit's data plate matches before ordering. If your system uses a different VA-rated transformer, our fitment team is available to verify compatibility before you purchase — same-day shipping guaranteed on in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909553115507,"sku":"CARRIE-FA4BNF048008AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909553148275,"sku":"CARRIE-FA4BNF048008AAAA-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_a1d273af-4547-4816-97ea-92b420fc73fb.jpg?v=1782940871","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4bnf048008aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}