{"product_id":"carrier-transformer-fb4bnf048000aaaa","title":"OEM Carrier Transformer HT01BD216 for Model FB4BNF048000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer HT01BD216 for Model FB4BNF048000AAAA\u003c\/h1\u003e\n\u003cp\u003eThe OEM Carrier transformer (HT01BD216) steps down line voltage to the 24V control power that runs the thermostat, relays, and control board in your FB4BNF048000AAAA fan coil unit. When a transformer fails or shorts, the entire low-voltage control circuit goes dead — the thermostat goes blank, the blower won't respond, and nothing cycles. This genuine factory replacement matches the exact VA rating and voltage specifications Carrier requires for the FB4BNF048000AAAA, restoring reliable control power and protecting downstream components. Installation is moderate and best handled by an HVAC technician: shut off power, label the primary and secondary leads, mount the new transformer, and reconnect the wiring to the correct terminals. Always confirm your original transformer's ratings and check for the short or overload that caused the failure before energizing. An OEM transformer ensures correct output and long-term reliability that generic units can't guarantee. In stock and ready to ship same-day on orders before 3PM CST, so your air handler's controls are back online fast with genuine Carrier quality.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4BNF048000AAAA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62951287619955,"sku":"carrier-transformer-fb4bnf048000aaaa","price":48.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4bnf048000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}