{"product_id":"carrier-gb3aav060115aeja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV060115AEJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB3AAV060115AEJA — Part# HT01BC116\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB3AAV060115AEJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, gas valve, and all low-voltage control circuits. When the transformer fails, the entire control system goes dark — the thermostat loses power, the furnace won't respond to any call for heat or cooling, and in many cases the system appears completely dead. A failed transformer is often misdiagnosed as a bad control board, making this an important first diagnostic check.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 insulation | Factory-matched to Carrier GB3AAV060115AEJA control circuit requirements | OEM part number HT01BC116\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for your specific control board's current draw. Undersized or off-tolerance generic units can overheat, trip the internal thermal fuse, or deliver unstable 24V output — causing erratic lockouts and nuisance fault codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Photograph or label all wiring connections before disconnecting. Confirm secondary voltage reads 24–28V AC after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 as a direct OEM replacement for the Carrier \u003cstrong\u003eGB3AAV060115AEJA\u003c\/strong\u003e gas furnace. Always verify the existing transformer's VA rating and primary\/secondary voltages on your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping on all in-stock orders placed before 3 PM.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909387571571,"sku":"CARRIE-GB3AAV060115AEJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909387604339,"sku":"CARRIE-GB3AAV060115AEJA-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_d42e6c20-2005-4a1d-ac02-5cca3978331f.jpg?v=1782941463","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav060115aeja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}