{"product_id":"carrier-gb1aav036065adja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV036065ADJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model GB1AAV036065ADJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier GB1AAV036065ADJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire control circuit — including the thermostat, gas valve, contactor coils, and the integrated furnace control board. When the transformer fails, nothing in the low-voltage control circuit responds: the thermostat goes dark, the furnace won't call for heat, and the system appears completely dead despite power being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM part number HT01BC116 | Matches original mounting footprint and terminal configuration for drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM Carrier transformer is wound to exact VA and voltage tolerances required by the GB1AAV036065ADJA control board. Undersized or off-tolerance generic transformers can sag under full control-circuit load, causing erratic ignition sequences, nuisance lockouts, 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 breaker and disconnect the furnace service switch before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching wiring). Photograph all low-voltage wiring connections before removal. Swap wire-for-wire and restore power to verify 24V output before closing the cabinet.\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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eGB1AAV036065ADJA\u003c\/strong\u003e gas furnace. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909428040051,"sku":"CARRIE-GB1AAV036065ADJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909428072819,"sku":"CARRIE-GB1AAV036065ADJA-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_5c62d8cb-a303-4f45-ae7c-3ebc391eb44e.jpg?v=1782941364","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav036065adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}