{"product_id":"carrier-transformer-fa4bnc018010aaaa","title":"OEM Carrier Transformer Replacement for Model FA4BNC018010AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FA4BNC018010AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer converts incoming line voltage to the 24V control power that drives the thermostat, relays, and contactor on your FA4BNC018010AAAA fan coil unit. When the transformer fails, the low-voltage control circuit loses power entirely—leaving you with a blank thermostat, an unresponsive blower, and no cooling—despite full high-voltage supply at the unit. Common causes include a shorted control wire, a failed relay coil, or a chronic overload on the secondary winding. Wound to Carrier's exact VA and voltage ratings, this direct-fit replacement restores stable control power and shields connected components from damage. Installation is moderate difficulty: cut power at the breaker, photograph the primary and secondary leads before disconnecting, mount the new transformer, and reconnect the color-coded wires to matching terminals in about 30 minutes. Be sure to find and fix any short that caused the original failure. Genuine OEM construction delivers clean, regulated output and longer life than generic transformers. In stock and ships same-day on orders placed before 3PM CST.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FA4BNC018010AAAA.\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":62956857065843,"sku":"carrier-transformer-fa4bnc018010aaaa","price":55.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fa4bnc018010aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}