{"product_id":"carrier-hgrh50hj441137-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V\/24V for HGRH50HJ441137","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model HGRH50HJ441137\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HGRH50HJ441137\u003c\/strong\u003e. The transformer steps down line voltage from 120V to the 24V signal voltage required to power your thermostat, control board, contactor coil, and all other low-voltage control circuit components. When this part fails, nothing in the control system responds — the thermostat goes dark, no call for heat or cooling is processed, and the system appears completely dead despite having power at the disconnect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120VAC | Secondary voltage: 24VAC | VA rating: 40VA | OEM part number: HT01BD209 | Factory-matched output for Carrier control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like this HT01BD209 are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance generic transformers can cause nuisance tripping of the secondary fuse, erratic thermostat behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to verify 24V output after installation. Label or photograph all low-voltage wiring before disconnecting from the old unit.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-specified for the Carrier \u003cstrong\u003eHGRH50HJ441137\u003c\/strong\u003e. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909329867123,"sku":"CARRIE-HGRH50HJ441137-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909329899891,"sku":"CARRIE-HGRH50HJ441137-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_29a5bdba-1c42-4241-8782-cbcc1d4765db.jpg?v=1782941637","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hgrh50hj441137-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}