{"product_id":"carrier-fiop100e311ga-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for FIOP100E311GA — HT01BD209","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FIOP100E311GA (HT01BD209)\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer, Carrier part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e, is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FIOP100E311GA\u003c\/strong\u003e unit. The transformer steps down line voltage (120V) to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dark — your thermostat will appear dead, contactors won't pull in, and no heating or cooling call will be processed. It is often the first component to check when nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BD209 | Factory-matched for Carrier FIOP100E311GA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to Carrier's exact specifications, ensuring stable 24V output under full load. Generic units may sag under demand, causing intermittent lockouts and nuisance tripping on sensitive control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V output at secondary terminals after installation before restoring full power. Photograph all wiring connections prior to removal.\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 as a direct OEM replacement for the Carrier \u003cstrong\u003eFIOP100E311GA\u003c\/strong\u003e. Always verify your unit's data plate voltage and VA requirements match before ordering. Our fitment team is available to confirm compatibility — reach out before you buy if you have any questions. Order now for same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909508321651,"sku":"CARRIE-FIOP100E311GA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909508354419,"sku":"CARRIE-FIOP100E311GA-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_538ad77c-b971-486a-807c-50b6731d508f.jpg?v=1782941044","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fiop100e311ga-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}