{"product_id":"carrier-transformer-fb4cnf042l10abaa","title":"OEM Carrier 24V Control Transformer for Model FB4CNF042L10ABAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier 24V Control Transformer for Model FB4CNF042L10ABAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier 24-volt control transformer is the exact factory replacement for the FB4CNF042L10ABAA fan coil unit. The transformer steps down high-voltage line power to the 24V signal that energizes your thermostat, control board, and low-voltage circuits. A failed transformer is a leading cause of a dead HVAC system, a blank thermostat, or low-voltage fuses that keep blowing. Manufactured to Carrier's original engineering specifications, this part provides the proper VA output and reliable, long-term performance matched to the FB4CNF042L10ABAA. Installation is a moderate DIY project for anyone comfortable with basic electrical work: shut off power, photograph the existing wiring, remove the failed transformer, install the replacement, and reconnect. Most installs take under 30 minutes. Always make sure power is disconnected before servicing. Using the correct OEM transformer rather than a universal part protects your control board and avoids the recurring problems caused by mismatched VA ratings. In stock and ships same-day when ordered before 3PM CST, so your Carrier system is back up quickly.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4CNF042L10ABAA.\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":62950466814323,"sku":"carrier-transformer-fb4cnf042l10abaa","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4cnf042l10abaa","provider":"National HVAC Parts","version":"1.0","type":"link"}