{"product_id":"carrier-transformer-fb4cnf036000abaa","title":"OEM Carrier Transformer for Model FB4CNF036000ABAA Air Handler","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer for Model FB4CNF036000ABAA Air Handler\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer is the authentic factory replacement for the FB4CNF036000ABAA fan coil air handler. It steps line voltage down to the 24V control voltage required to power the thermostat, contactor, and the unit's low-voltage control circuit. When this transformer fails, the air handler's controls go completely dead — no thermostat signal and no contactor engagement — which is why it's one of the first parts a technician checks during a no-response diagnosis. Built to the exact Carrier specification, it matches the original VA rating, secondary leads, and mounting bracket, dropping straight into the FB4CNF036000ABAA with no rewiring needed. Installation is moderate in difficulty: kill power at the breaker, label and move the primary and secondary wires, secure the transformer, reconnect, and confirm 24V on the secondary with a multimeter before energizing. Installing a genuine OEM transformer protects the control board and maintains Carrier system reliability. This part is in stock and ships same-day when ordered before 3PM CST.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4CNF036000ABAA.\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":62950595559795,"sku":"carrier-transformer-fb4cnf036000abaa","price":49.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4cnf036000abaa","provider":"National HVAC Parts","version":"1.0","type":"link"}