{"product_id":"carrier-transformer-fa4cnf042000aaaa","title":"OEM Carrier Transformer Replacement for Model FA4CNF042000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FA4CNF042000AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier transformer converts line voltage into the low-voltage control power that runs the thermostat, relays, and control board in your Carrier FA4CNF042000AAAA fan coil unit. When the transformer fails, the system loses its 24V control power, leaving the thermostat blank and the equipment entirely unresponsive. Built to exact factory primary and secondary voltage ratings, this transformer is a direct-fit replacement for the FA4CNF042000AAAA, providing the correct VA capacity for the unit's control circuit. Because a blown transformer often results from a wiring short or power surge, a technician should identify the root cause before fitting the new part. Installation is moderate in difficulty: disconnect power, move the primary and secondary leads to matching terminals, and confirm output with a meter. Choosing the OEM transformer ensures the right load rating and shields downstream components from damage. We keep this transformer in stock and ship same-day on all orders placed before 3PM CST, so your Carrier repair stays on track. Restore reliable control power with the authentic factory part.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FA4CNF042000AAAA.\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":62955353112947,"sku":"carrier-transformer-fa4cnf042000aaaa","price":54.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fa4cnf042000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}