{"product_id":"carrier-ga2aad036055aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GA2AAD036055AAJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GA2AAD036055AAJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part # HT01BC116) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier GA2AAD036055AAJA\u003c\/strong\u003e packaged or split-system unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dark: the thermostat becomes unresponsive, the system won't call for heating or cooling, and you may measure 0V at the R and C thermostat terminals even with power to the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BC116 | Factory-matched windings and insulation class for long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier GA2AAD036055AAJA control circuit. Undersized or off-tolerance generic units can overheat, trip the internal fuse, or cause erratic thermostat behavior — often misdiagnosed as a bad control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before beginning. Tools needed: flat-head and Phillips screwdrivers, multimeter, needle-nose pliers. Label and photograph all low-voltage wiring before disconnecting. Verify 0V at primary leads with a multimeter before touching any terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for \u003cstrong\u003eCarrier model GA2AAD036055AAJA\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing transformer label before ordering. Not sure if this is your part? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no returns.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909444718963,"sku":"CARRIE-GA2AAD036055AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909444751731,"sku":"CARRIE-GA2AAD036055AAJA-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_c39a2d1a-37b8-4095-9168-84662a7ad154.jpg?v=1782938696","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga2aad036055aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}