{"product_id":"carrier-gb3aav036070adja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V HT01BC116 for GB3AAV036070ADJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC116 for Model GB3AAV036070ADJA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB3AAV036070ADJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, contactor coils, and control board. When this component fails, the entire control circuit goes dead: the thermostat shows no power, no heating or cooling calls are processed, and the system will not respond in any mode. It is often the first component to check when a system appears completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM Part# HT01BC116 | Factory-matched output tolerance for stable low-voltage operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to Carrier's exact factory specifications. Generic transformers may carry inconsistent VA ratings or looser voltage tolerances, which can cause nuisance tripping, control board brownouts, or premature failure of downstream 24V components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at the primary terminals before handling. Photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders received by 3PM local time ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eGB3AAV036070ADJA\u003c\/strong\u003e gas furnace. Confirm primary voltage (120V) and VA rating (40VA) on your unit's data plate or existing transformer label before ordering. If you are unsure of fitment, our HVAC parts specialists will verify compatibility before your order is placed — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909398548851,"sku":"CARRIE-GB3AAV036070ADJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909398581619,"sku":"CARRIE-GB3AAV036070ADJA-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_d374b3a4-6139-44e5-bec3-178b39a6796c.jpg?v=1782899645","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036070adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}