{"product_id":"carrier-transformer-fb4bnf042000aaaa","title":"OEM Carrier Transformer Replacement for Model FB4BNF042000AAAA Unit","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FB4BNF042000AAAA Unit\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer is the exact-fit low-voltage replacement transformer for your FB4BNF042000AAAA fan coil unit. It converts incoming line voltage into the 24V control power that drives your thermostat, control board, and relays — the control signal behind every heating and cooling cycle. A failed transformer typically presents as a dead system, blown control fuses, or a thermostat with no power. Manufactured to Carrier's original VA and voltage specifications, it installs in the factory mounting position and wires in cleanly with no modification required. Installation is a moderate job for a qualified technician: cut power, connect the primary leads to line voltage and the secondary leads to the 24V circuit, then fasten it securely. Always confirm the VA rating matches your original before energizing. Genuine OEM parts supply the stable, correct control voltage that generic transformers can't always guarantee. Restore reliable control power to your Carrier FB4BNF042000AAAA. In stock and ships same-day on orders before 3PM CST.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4BNF042000AAAA.\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":62951342899571,"sku":"carrier-transformer-fb4bnf042000aaaa","price":54.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4bnf042000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}