{"product_id":"carrier-fiop100f311ga-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for FIOP100F311GA — HT01BD209","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model FIOP100F311GA\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 FIOP100F311GA\u003c\/strong\u003e unit. The transformer steps down 120V line voltage to the 24V signal voltage required to power the thermostat, control board, and all low-voltage switching components. When this part fails, the entire control circuit goes dead — the thermostat goes blank, contactors won't energize, and the system produces no response to any call for heating or cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Compatible with standard low-voltage control circuits | Factory-matched OEM construction for reliable, long-term operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to exact factory specifications. Generic transformers may carry incorrect VA ratings or use inferior core materials, leading to voltage sag under load and premature failure of connected control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify incoming voltage and confirm 24V output before reconnecting the control board. Always photograph existing wiring before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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\u003eFIOP100F311GA\u003c\/strong\u003e unit. Confirm transformer VA rating and primary\/secondary voltage on your unit's data plate or wiring diagram before ordering. If your thermostat screen is blank and your control board shows no activity, the transformer is the first component to test with a multimeter. Order with confidence — our HVAC parts team can verify fitment before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909508059507,"sku":"CARRIE-FIOP100F311GA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909508092275,"sku":"CARRIE-FIOP100F311GA-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_52418a9e-2135-4f84-a4a1-9d4fc52f4a06.jpg?v=1782941046","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fiop100f311ga-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}