{"product_id":"carrier-transformer-fc4cnf042000aaaa","title":"OEM Carrier Transformer Replacement for Model FC4CNF042000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FC4CNF042000AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier transformer is the factory replacement for the FC4CNF042000AAAA fan coil unit. The transformer steps your incoming line voltage down to the low-voltage control circuit (typically 24V) that powers the thermostat, control board, and relays. When a transformer fails, the entire control system goes dead: no thermostat display, no fan, and no response from the unit even though high-voltage power is present. This OEM transformer is rated to the exact primary and secondary voltage and VA capacity Carrier specified for the FC4CNF042000AAAA, ensuring stable control power and protecting downstream components from undervoltage damage. Installation is a moderate job best suited to those comfortable with low-voltage wiring: shut off power, label and transfer the primary and secondary leads, and mount the new transformer to the existing bracket. Most techs finish in 20 to 30 minutes. Always confirm power is off at the breaker before touching any wiring. Order before 3PM CST and your transformer ships same-day to minimize system downtime.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FC4CNF042000AAAA.\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":62947545055603,"sku":"carrier-transformer-fc4cnf042000aaaa","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fc4cnf042000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}