{"product_id":"carrier-transformer-fa4bnc024005aaaa","title":"OEM Carrier Transformer Replacement for Model FA4BNC024005AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FA4BNC024005AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer steps down line voltage to the low-voltage 24V control circuit that powers the thermostat, relays, and contactor on your FA4BNC024005AAAA fan coil unit. Without a healthy transformer, the entire control side of your system goes dead—no thermostat display, no fan response, and no cooling—even though high-voltage power is present. A blown transformer is commonly caused by a control wiring short, a stuck relay, or an overloaded secondary winding. This direct-fit replacement is wound to Carrier's exact VA rating and primary\/secondary voltages to restore proper control power and protect downstream components. Installation is moderate difficulty: shut off power, photograph the primary and secondary leads, mount the new transformer, and reconnect the color-coded wires to matching terminals—about 30 minutes for an experienced DIYer. Correcting the underlying short before replacement prevents a repeat failure. Genuine OEM build quality ensures stable voltage output and long service life over generic units. 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 FA4BNC024005AAAA.\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":62956853920115,"sku":"carrier-transformer-fa4bnc024005aaaa","price":55.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fa4bnc024005aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}