{"product_id":"carrier-ga2aad048110acja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for GA2AAD048110ACJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GA2AAD048110ACJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GA2AAD048110ACJA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V required by your system's control circuit, powering the thermostat, control board, contactor coil, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — you'll see a blank thermostat display, no response to calls for heating or cooling, and potentially a blown 5-amp fuse on the control board. It is one of the first components to inspect 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 wire lead terminations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact VA and voltage tolerances specified by Carrier engineering. Undersized or off-spec generic transformers can overheat under normal control circuit loads, leading to repeated failures and potential damage to the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output after installation before restoring full power. Always check for a shorted low-voltage circuit before replacing — a short will blow any transformer immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship 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\u003eGA2AAD048110ACJA\u003c\/strong\u003e packaged unit. Always verify input voltage, output voltage, and VA rating on your existing transformer's label before ordering. If you're unsure of fitment, our HVAC parts specialists can verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909440754035,"sku":"CARRIE-GA2AAD048110ACJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909440786803,"sku":"CARRIE-GA2AAD048110ACJA-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_f1afacc9-2dd0-42fd-9453-573aeaceb48f.jpg?v=1782939790","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga2aad048110acja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}