{"product_id":"carrier-transformer-fk4dnf002000aaaa","title":"OEM Carrier Transformer HT01BL233 for Model FK4DNF002000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer HT01BL233 for Model FK4DNF002000AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier control transformer (HT01BL233) converts incoming line voltage to the 24-volt power that runs the thermostat, contactor, and control circuitry on your Carrier FK4DNF002000AAAA fan coil. The transformer is essential to every call for heating or cooling — when it fails, the low-voltage system goes completely dead, leaving you with an unresponsive thermostat and a unit that won't start. A blown transformer is a common, affordable repair often triggered by a momentary control short. This OEM part is matched to the FK4DNF002000AAAA's exact primary\/secondary voltage and VA rating, delivering clean, properly-rated 24V control power that off-brand parts may not provide. Installation is moderate: with power disconnected, a technician transfers the leads, verifies the VA rating, and mounts the unit in about 20-30 minutes. Since it connects to line voltage, professional installation is recommended. We stock this transformer and ship same-day on orders placed before 3PM CST. Bring your control circuit back to life quickly with a true Carrier OEM transformer built for lasting performance.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FK4DNF002000AAAA.\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":62942921130355,"sku":"carrier-transformer-fk4dnf002000aaaa","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fk_86f76005-c82b-4cef-99f3-46064576228e.jpg?v=1781473970","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fk4dnf002000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}