{"product_id":"carrier-ga1aad042070abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GA1AAD042070ABJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model GA1AAD042070ABJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GA1AAD042070ABJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V signal required to power your thermostat, control board, and all low-voltage control circuits. When this component fails, the entire control circuit loses power — your thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing works despite the unit having line voltage present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM part number HT01BC116 | Replaces worn or shorted transformers causing complete control circuit failure\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, ensuring the 24V secondary holds steady under full control-circuit load. Generic transformers rated at nominal 40VA often sag under peak demand, causing intermittent lockouts and nuisance trips on sensitive control boards.\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. Photograph all wiring connections before removal. Confirm 24V output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 specifically for the Carrier \u003cstrong\u003eGA1AAD042070ABJA\u003c\/strong\u003e packaged unit. Cross-reference OEM part number HT01BC116 against your unit's data plate and wiring diagram before ordering. If you're unsure of fitment, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909452222835,"sku":"CARRIE-GA1AAD042070ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909452255603,"sku":"CARRIE-GA1AAD042070ABJA-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_2db889df-48d3-46f7-bbce-fed2f05646a8.jpg?v=1782941316","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad042070abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}