{"product_id":"carrier-gb1aav048111abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV048111ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB1AAV048111ABJA\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB1AAV048111ABJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage system controls. When this component fails, the entire control circuit goes dark — the thermostat loses power, the system won't respond to any calls for heating or cooling, and nothing operates. If your system is completely unresponsive and your thermostat display is blank, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BC116 | Factory-matched terminals for direct drop-in installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA tolerances, protecting downstream components like the control board from voltage fluctuations. Generic units may run under-rated VA, causing nuisance tripping or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Confirm primary and secondary voltages with a multimeter after installation before restoring system operation.\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 for the Carrier \u003cstrong\u003eGB1AAV048111ABJA\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing component label before ordering. Our fitment specialists are available to confirm compatibility before you buy — same-day shipping means your repair doesn't wait.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909418504563,"sku":"CARRIE-GB1AAV048111ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909418537331,"sku":"CARRIE-GB1AAV048111ABJA-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_c8413c27-9ce0-4272-93e8-3430e3970730.jpg?v=1782941381","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048111abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}