{"product_id":"carrier-fiop100c311ga-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for FIOP100C311GA — HT01BD209","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FIOP100C311GA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FIOP100C311GA\u003c\/strong\u003e. It steps down line voltage from 120V to the 24V AC signal required to power your thermostat, control board, and all low-voltage switching components. When the transformer fails, the entire control circuit goes dark — symptoms include a completely blank thermostat, no system response to any call for heating or cooling, and tripped or blown low-voltage fuses. It is often the first component to inspect when nothing works at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD209 | Factory-matched for Carrier FIOP100C311GA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to exact VA and voltage tolerances. Generic transformers frequently run outside rated VA capacity, causing premature failure and potentially damaging downstream control boards and contactors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Confirm input and output voltages with a multimeter after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eFIOP100C311GA\u003c\/strong\u003e unit. Always verify your existing transformer's input voltage, output voltage, and VA rating against your unit's data plate before ordering. If you have questions about fitment, our HVAC parts specialists can confirm compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909508682099,"sku":"CARRIE-FIOP100C311GA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909508714867,"sku":"CARRIE-FIOP100C311GA-TRANSFORMER-HT01BD209-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD209_1a20d5ad-ad4b-4ae6-8cf3-1bbc41f8df03.jpg?v=1782941039","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fiop100c311ga-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}