{"product_id":"carrier-ga1aad042070aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GA1AAD042070AAJA — HT01BC116","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC116 for Model GA1AAD042070AAJA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eGA1AAD042070AAJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage control circuits. When this transformer fails, absolutely nothing will respond — the thermostat goes blank, the system won't call for heat or cooling, and no fault codes will display because the control board itself has lost power. A blown transformer is often caused by a shorted low-voltage wire or a failed component drawing excess current; always inspect the low-voltage circuit before replacing.\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 output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to exact VA and voltage tolerances. Generic transformers often underperform under sustained load, causing intermittent lockouts, nuisance tripping, or premature control board failure due to voltage fluctuations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting and inspect for shorts that may have caused original failure.\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 stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eGA1AAD042070AAJA\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — no guesswork needed. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909452583283,"sku":"CARRIE-GA1AAD042070AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909452616051,"sku":"CARRIE-GA1AAD042070AAJA-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_a2e753b0-a4b6-4239-9e8c-7d15e881a20a.jpg?v=1782938683","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad042070aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}