{"product_id":"carrier-gb3aav048095agja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV048095AGJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB3AAV048095AGJA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB3AAV048095AGJA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers your entire control circuit — including the thermostat, control board, contactor coils, and gas valve. When the transformer fails, nothing in the system responds: the thermostat goes blank, the furnace won't fire, and diagnostic LEDs on the control board may not illuminate at all. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | OEM part number HT01BC116 | Factory-matched output tolerances for reliable control circuit performance\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 peak demand, causing erratic board behavior, nuisance lockouts, or premature failure of downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter (to confirm input\/output voltage and rule out a downstream short). Always verify the 24V circuit is free of shorts before energizing the new transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders received by 3 PM local time ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and tested for the Carrier \u003cstrong\u003eGB3AAV048095AGJA\u003c\/strong\u003e gas furnace. Verify the OEM part number HT01BC116 and 40VA \/ 120V–24V rating against your unit's data plate and existing transformer before ordering. Our parts specialists are available to confirm fitment — contact us before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909391864179,"sku":"CARRIE-GB3AAV048095AGJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909391896947,"sku":"CARRIE-GB3AAV048095AGJA-TRANSFORMER-HT01BC116-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-HT01BC116_8e887bdb-f312-4af5-9f7c-bb6511ecb0e5.jpg?v=1782941445","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav048095agja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}