{"product_id":"carrier-ga1aad060120aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for GA1AAD060120AAJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GA1AAD060120AAJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GA1AAD060120AAJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, absolutely nothing works: the thermostat goes dark, the system won't respond to any call for heat or cooling, and no diagnostic codes appear on the control board. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before replacing more expensive components.\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 | Direct plug-in or screw-terminal mount | Factory-matched for Carrier GA1AAD060120AAJA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances ensuring stable 24V output under full control-circuit load. Undersized or off-spec generic units can sag voltage during demand, causing erratic board behavior, nuisance lockouts, and premature contactor failure.\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 starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Photograph existing wiring connections before removing the old unit. Check for a blown fuse on the control board — a shorted wire downstream often takes out the transformer and the board fuse simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eGA1AAD060120AAJA\u003c\/strong\u003e gas furnace. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or 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":62909448552819,"sku":"CARRIE-GA1AAD060120AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909448585587,"sku":"CARRIE-GA1AAD060120AAJA-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_e4e2cc1e-6593-4a6f-b6a2-fa9a684e73c3.jpg?v=1782939780","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad060120aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}