{"product_id":"carrier-gb1aav048091aeja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for GB1AAV048091AEJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB1AAV048091AEJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier GB1AAV048091AEJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, gas valve, and all low-voltage switching circuits. When this component fails, the entire control system loses power — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no safeties or sequencers can operate. It is often one of the first components to check when nothing in the system appears to work.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Factory OEM part number HT01BC116 | Engineered to exact Carrier tolerances for the GB1AAV048091AEJA platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BC116 transformer is wound to Carrier's exact VA and impedance specifications, protecting downstream components like the control board and gas valve from voltage fluctuation. Generic transformers may underperform under full control-circuit load, causing nuisance tripping or premature board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter. Label all low-voltage wiring connections before removal. Verify 24V output at secondary terminals after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our HVAC parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eGB1AAV048091AEJA\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. If you need fitment confirmation, our parts specialists verify compatibility before you purchase — no guesswork required. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909420011891,"sku":"CARRIE-GB1AAV048091AEJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909420044659,"sku":"CARRIE-GB1AAV048091AEJA-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_76b3ae91-a9d6-46e6-8c8f-95876208ddb8.jpg?v=1782939812","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048091aeja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}