{"product_id":"carrier-transformer-fa4cnf036005aaaa","title":"OEM Carrier Transformer Replacement for Model FA4CNF036005AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FA4CNF036005AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer supplies the low-voltage 24V control power that runs the thermostat, relays, and control board in your FA4CNF036005AAAA fan coil. When a transformer fails — often from a control short or power surge — the entire system goes dead: no thermostat display, no blower, no cooling call. This genuine replacement matches the exact primary and secondary voltage ratings and VA capacity Carrier engineered for the FA4CNF036005AAAA, ensuring stable control power and proper fitment on the original mounting bracket. Installation is moderate and should be performed by a qualified technician: disconnect power, note the primary tap wiring, transfer leads one at a time, and confirm 24V output before restoring the unit. The OEM part avoids the VA-rating mismatches that cause repeat failures with generic transformers. We keep this component in stock — orders before 3PM CST ship same-day so your repair isn't delayed. Contact our specialists if you need help matching the correct VA rating.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FA4CNF036005AAAA.\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":62955450663283,"sku":"carrier-transformer-fa4cnf036005aaaa","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fa4cnf036005aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}