{"product_id":"carrier-transformer-fb4cnp025l10aaaa","title":"OEM Carrier Transformer Replacement for Model FB4CNP025L10AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer Replacement for Model FB4CNP025L10AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier transformer steps line voltage down to the 24V control voltage needed by the control board, thermostat, and relays in your FB4CNP025L10AAAA fan coil air handler. When the transformer fails, the low-voltage control circuit goes completely dead, leaving an unresponsive thermostat and a system that won't engage on a call for heating or cooling. A genuine Carrier transformer restores the correct secondary output and protects the components it powers. This part is matched to the FB4CNP025L10AAAA's VA rating and mounting pattern for a precise fit with no modifications. Replacement is a relatively easy job for a trained technician: disconnect power, note the primary and secondary lead colors, swap the unit, and verify 24V at the secondary terminals. Choosing OEM avoids the mismatched ratings and wiring guesswork that come with universal transformers. Order before 3PM CST and your part ships the same day, minimizing system downtime. Each transformer arrives new and ready to install, backed by genuine Carrier quality and fit.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4CNP025L10AAAA.\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":62950088212851,"sku":"carrier-transformer-fb4cnp025l10aaaa","price":44.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fb4cnp025l10aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}