{"product_id":"carrier-gb1aav048091afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV048091AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB1AAV048091AFJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB1AAV048091AFJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down line voltage (120V) to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the system goes completely dark: no thermostat response, no blower, no ignition. It is often the first component to check when nothing in the system responds at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched to Carrier GB1AAV048091AFJA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact VA and voltage tolerances. Generic transformers may undervolt the control board under load, causing intermittent lockouts, nuisance tripping, or premature control board failure — making the OEM choice the lower-cost option long-term.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Photograph or label all low-voltage wiring before disconnecting terminals. Check for a blown fuse on the secondary side before condemning the transformer.\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 Designed and tested for the Carrier \u003cstrong\u003eGB1AAV048091AFJA\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909419520371,"sku":"CARRIE-GB1AAV048091AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909419553139,"sku":"CARRIE-GB1AAV048091AFJA-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_a9d9874c-8c57-4684-b70a-caba47d55718.jpg?v=1782941379","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048091afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}