{"product_id":"carrier-ga2aad048090abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GA2AAD048090ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GA2AAD048090ABJA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GA2AAD048090ABJA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails — due to a short in the low-voltage wiring, a failed component drawing excess current, or simple age — your entire system goes completely silent. The thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no fault codes are generated because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Class 2 control transformer | Direct OEM replacement for part number HT01BC116\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM transformer is wound to exact VA and voltage tolerances for the GA2AAD048090ABJA control circuit. Generic transformers frequently underrate their VA capacity, causing nuisance tripping or premature burnout under normal system loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is absent before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring connections at the secondary terminals before removal to ensure correct reinstallation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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\u003eGA2AAD048090ABJA\u003c\/strong\u003e packaged unit. Always verify incoming line voltage and VA requirements on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — ensuring you get the right part the first time and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909441802611,"sku":"CARRIE-GA2AAD048090ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909441835379,"sku":"CARRIE-GA2AAD048090ABJA-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_e19fc4d7-d287-4336-beda-aa82dc0ea308.jpg?v=1782941328","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga2aad048090abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}