{"product_id":"carrier-hgrh50hj441454-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for HGRH50HJ441454","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model HGRH50HJ441454\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HGRH50HJ441454\u003c\/strong\u003e. The control transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the entire system goes dark: the thermostat loses power, nothing responds, and no heating or cooling function is possible. A failed transformer is often identified by a blown 3-amp fuse on the control board or a burned smell near the electrical cabinet.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD209 | Factory-matched to Carrier HGRH50HJ441454 control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class. Undersized generic transformers can overheat under full control circuit load, leading to repeated failures and nuisance blown fuses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after install. Always confirm the secondary fuse is intact before powering up.\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\u003eHGRH50HJ441454\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get back to comfort fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909328949619,"sku":"CARRIE-HGRH50HJ441454-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909328982387,"sku":"CARRIE-HGRH50HJ441454-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_28da16f6-dca7-4d0e-91eb-8ab3e2f07eb0.jpg?v=1782941645","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hgrh50hj441454-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}