{"product_id":"carrier-gb3aav036050afja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for GB3AAV036050AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V\/24V for Model GB3AAV036050AFJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV036050AFJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down line voltage from 120V to the 24V AC signal used by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any calls for heating or cooling, and no components will energize. It is one of the first components to check when nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched terminal configuration for direct drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class. Generic transformers often run undersized VA, causing overheating under full control-circuit load and premature failure — especially on multi-stage systems drawing current from multiple zones or accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output at secondary terminals before closing the cabinet.\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 as a direct OEM replacement for the Carrier \u003cstrong\u003eGB3AAV036050AFJA\u003c\/strong\u003e packaged unit. Always verify the primary voltage (120V) and VA rating on your existing transformer's data label before ordering. If you are unsure of fitment, our technical team is available to confirm compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909400318323,"sku":"CARRIE-GB3AAV036050AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909400351091,"sku":"CARRIE-GB3AAV036050AFJA-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_31ba0822-6415-4d6b-a2b8-62c92d46a97a.jpg?v=1782899591","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036050afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}