{"product_id":"carrier-transformer-fb4bnf042015aaaa","title":"OEM Carrier Transformer Replacement for Model FB4BNF042015AAAA Unit","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FB4BNF042015AAAA Unit\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer is the exact replacement low-voltage transformer for your FB4BNF042015AAAA fan coil unit. It steps incoming line voltage down to the 24V control signal that powers your thermostat, control board, and relays — without it, your system can't initiate a heating or cooling cycle. Built to Carrier's original specifications, this transformer delivers reliable, stable voltage and drops directly into the factory mounting location with no modification. A failed transformer is a common cause of a completely dead system or tripped fuses, and replacing it restores full control power. Installation is moderate: a qualified technician can swap it in roughly 30–45 minutes by matching the primary and secondary leads. Always confirm the VA rating matches your original before wiring. Genuine OEM construction ensures correct fit and long service life versus generic alternatives. In stock and ships same-day when ordered before 3PM CST, so you can get your Carrier FB4BNF042015AAAA system back online fast.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4BNF042015AAAA.\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":62951341457779,"sku":"carrier-transformer-fb4bnf042015aaaa","price":54.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4bnf042015aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}