{"product_id":"carrier-gb3aav060115afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV060115AFJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120\/24V for Model GB3AAV060115AFJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV060115AFJA\u003c\/strong\u003e gas furnace. The control transformer steps down incoming 120V line voltage to the 24V signal voltage required by your thermostat, control board, gas valve, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — your thermostat will show no response, your furnace will not attempt ignition, and nothing will happen when you call for heat or cooling. A failed transformer is often misdiagnosed as a bad control board, making this an important first diagnostic step.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Direct OEM replacement | Part number HT01BC116 | Factory-matched output voltage within ±2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to exact factory specifications, ensuring stable 24V output under full load. Generic units often deliver inconsistent voltage that can cause nuisance lockouts, erratic thermostat behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label or photograph all low-voltage wiring before disconnecting. Verify fuse integrity on the control board after replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier GB3AAV060115AFJA\u003c\/strong\u003e gas furnace. Cross-reference part number HT01BC116 against your unit's data plate and wiring diagram before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase. In stock and ready to ship today — get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909387309427,"sku":"CARRIE-GB3AAV060115AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909387342195,"sku":"CARRIE-GB3AAV060115AFJA-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_c4fbc1c7-69d7-4ec0-b19e-057006f9d219.jpg?v=1782941465","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav060115afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}