{"product_id":"carrier-gb3aav024035aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GB3AAV024035AAJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB3AAV024035AAJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV024035AAJA\u003c\/strong\u003e gas furnace. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and safety switches. When this component fails, the entire system goes dark: the thermostat shows no response, the control board is unresponsive, and absolutely nothing happens when a call for heat or cooling is made. A failed transformer is one of the most overlooked root causes of a completely unresponsive HVAC system.\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 wire leads for direct reconnection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to exact Carrier factory specifications. Generic transformers frequently use undersized VA ratings that overheat under normal control circuit loads, causing repeated failures and potential damage to downstream components like the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label or photograph existing wire connections before disconnecting the old transformer.\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 warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for Carrier model \u003cstrong\u003eGB3AAV024035AAJA\u003c\/strong\u003e. Always verify the transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping means you're back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909406511475,"sku":"CARRIE-GB3AAV024035AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909406544243,"sku":"CARRIE-GB3AAV024035AAJA-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_05109a83-cfa0-4f76-9870-7bc93ac518c2.jpg?v=1782938738","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav024035aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}