{"product_id":"carrier-gb1aav024065agja-transformer-h3hvc4","title":"OEM Carrier Transformer 40VA 120\/24V for GB1AAV024065AGJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB1AAV024065AGJA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01CN001\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eGB1AAV024065AGJA\u003c\/strong\u003e gas furnace. The transformer is the heart of the low-voltage control circuit — it steps down 120V line voltage to the 24V signal voltage required by the thermostat, control board, gas valve, and all other control-side components. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the furnace won't respond to any call for heat or cooling, and nothing turns on. It is one of the most commonly overlooked causes of a completely unresponsive system.\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 HT01CN001 | Factory-matched output for Carrier control circuits\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 Carrier control boards. Undersized or off-tolerance generic units can cause erratic thermostat behavior, nuisance tripping of the limit switch, or premature control board failure.\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 screwdriver, multimeter (to confirm 24V output after install), wire nuts or quick-connect terminals. Photograph all wiring before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM local time ship same business day from our climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eGB1AAV024065AGJA\u003c\/strong\u003e gas furnace. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to verify fitment — contact us before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909433053555,"sku":"CARRIE-GB1AAV024065AGJA-TRANSFORMER-HT01CN001","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909433086323,"sku":"CARRIE-GB1AAV024065AGJA-TRANSFORMER-HT01CN001-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-HT01CN001_53268cfd-86b2-423b-9474-ad10cb008d22.jpg?v=1782938707","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav024065agja-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}