{"product_id":"carrier-fiop100b311ga-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for FIOP100B311GA — HT01BD209","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FIOP100B311GA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FIOP100B311GA\u003c\/strong\u003e. The transformer steps down line voltage (120V) to the 24V low-voltage signal required to power the control board, thermostat, and all control circuit components. When this part fails, the entire control circuit goes dark — your thermostat will appear dead, the system will not respond to any call for heating or cooling, and no error codes will display because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120VAC | Output: 24VAC | VA Rating: 40VA | OEM Part Number: HT01BD209 | Factory-matched primary and secondary winding specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier FIOP100B311GA control circuit. Undersized or off-spec generic transformers can overload and fail prematurely, or provide insufficient voltage to reliably operate the gas valve and contactor coils.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching wiring). Photograph all wiring connections before disconnecting. The transformer mounts to the cabinet panel and connects inline with the control board harness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This OEM transformer is specifically matched to the \u003cstrong\u003eCarrier FIOP100B311GA\u003c\/strong\u003e. Verify your unit's data plate confirms 120V primary input and 24V secondary output before ordering. If your system uses a 208\/240V primary input transformer, this unit will not be compatible — confirm input voltage before purchase. Our fitment team is available to verify compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909509042547,"sku":"CARRIE-FIOP100B311GA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909509075315,"sku":"CARRIE-FIOP100B311GA-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_8cbb3bb9-faf3-4264-8286-e33bebf44383.jpg?v=1782941037","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fiop100b311ga-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}