{"product_id":"carrier-transformer-fb4bnf030008aaaa","title":"OEM Carrier Transformer HT01BD250 for Model FB4BNF030008AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer HT01BD250 for Model FB4BNF030008AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier transformer is the precise replacement for the low-voltage supply in your FB4BNF030008AAAA fan coil air handler. It reduces incoming line voltage to the 24V control power that runs your thermostat, control board, and contactor, so when it fails the whole low-voltage system goes silent and the unit won't respond. Manufactured to Carrier's factory specifications, it mounts in the original position with matching primary and secondary leads, requiring no rewiring or cabinet modification. The replacement is a moderate DIY job for anyone comfortable working inside the air handler with power disconnected; most installs take roughly 30 minutes with basic hand tools and a multimeter to verify output voltage. Choosing the correct OEM transformer protects your control board and downstream electronics from voltage faults and prevents recurring nuisance failures. Every order placed before 3PM CST ships same-day from our warehouse, getting your heating and cooling back online quickly. Genuine Carrier quality for dependable, long-term service.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4BNF030008AAAA.\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":62951505723763,"sku":"carrier-transformer-fb4bnf030008aaaa","price":49.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4bnf030008aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}