{"product_id":"carrier-gb1aav036045afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV036045AFJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB1AAV036045AFJA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB1AAV036045AFJA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage down to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and inducer relay. When the transformer fails, nothing in the system responds: the thermostat goes blank, the furnace won't attempt ignition, and no call for heat or cooling is answered. A failed transformer is often caused by a short in the control wiring, so always inspect low-voltage circuits before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Hardwired leads | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and tested to Carrier's exact 40VA output specification. Generic transformers frequently run undersized VA ratings, causing voltage sag under load that trips the control board or damages the gas valve coil over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output with a meter after installation and before closing the cabinet. Check all low-voltage wiring for shorts before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships 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\u003eGB1AAV036045AFJA\u003c\/strong\u003e gas furnace. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If your wiring harness shows signs of burning or shorting, replace damaged wiring before installing the new transformer. Our fitment team is available to confirm compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909429416307,"sku":"CARRIE-GB1AAV036045AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909429449075,"sku":"CARRIE-GB1AAV036045AFJA-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_b1ba1173-3a39-435c-9394-f58eb77438e8.jpg?v=1782941359","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav036045afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}