{"product_id":"carrier-ga1aad066085abja-transformer-h2usbz","title":"OEM Carrier 40VA Control Transformer 24V for GA1AAD066085ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GA1AAD066085ABJA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eGA1AAD066085ABJA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the system goes completely silent: the thermostat goes dark, no relays click, and no heating or cooling function is available whatsoever. It is often the first component to check when nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01BC116 | Factory-matched class 2 transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA ratings, ensuring stable 24V output under full load. Generic units frequently under-deliver VA, causing nuisance tripping of the internal fuse and premature control board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wires before disconnecting, and inspect for any shorted wiring that may have caused the original failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. 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 the direct OEM replacement for Carrier model \u003cstrong\u003eGA1AAD066085ABJA\u003c\/strong\u003e. Verify your existing transformer's input\/output voltage and VA rating against your unit's data plate before ordering. If your low-voltage fuse has blown repeatedly, inspect the thermostat wiring for shorts before installing the new transformer. Our fitment team is available to confirm compatibility before you order — same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909445734771,"sku":"CARRIE-GA1AAD066085ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909445767539,"sku":"CARRIE-GA1AAD066085ABJA-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_92ba54ae-e153-4066-b22a-1903ee1bf8ab.jpg?v=1782899510","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad066085abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}