{"product_id":"carrier-gb1aav048111agja-transformer-h3hvc4","title":"OEM Carrier Transformer 40VA 24V for GB1AAV048111AGJA — HT01CN001","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model GB1AAV048111AGJA (HT01CN001)\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier GB1AAV048111AGJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and all safety switches. When this component fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and no error codes will display on the control board because there is no power to generate them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01CN001 | Factory-matched for Carrier GB1AAV048111AGJA packaged units | Quick-connect or screw terminals (verify with unit data plate)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN001 transformer is wound and insulated to Carrier's exact VA and thermal specifications. Generic transformers rated at nominal 40VA frequently run hot under sustained load, tripping the internal thermal overload or failing prematurely — often taking downstream control boards with them.\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 (to confirm 24V output before reconnecting loads), wire nuts or terminal connectors. Always verify the root cause of transformer failure — a shorted wire harness or failed component can blow a new transformer immediately if not corrected first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Leaves our warehouse the same business day when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eGB1AAV048111AGJA\u003c\/strong\u003e packaged gas\/electric unit. Cross-reference OEM part number \u003cstrong\u003eHT01CN001\u003c\/strong\u003e against your unit's data plate and wiring diagram to confirm fitment. The GB1AAV048 series designates a 4-ton packaged unit — confirm your VA rating and terminal configuration before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909416407411,"sku":"CARRIE-GB1AAV048111AGJA-TRANSFORMER-HT01CN001","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909416440179,"sku":"CARRIE-GB1AAV048111AGJA-TRANSFORMER-HT01CN001-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-HT01CN001_2d90be01-429c-4643-83e6-587c7945691f.jpg?v=1782942598","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048111agja-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}