{"product_id":"carrier-gb1aav048135abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV048135ABJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model GB1AAV048135ABJA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB1AAV048135ABJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V signal voltage required to power your thermostat, control board, and all low-voltage control components. When this transformer fails, the entire control circuit goes dark — the thermostat will appear dead, the system will not respond to any call for heating or cooling, and you may measure zero voltage at the 24V secondary terminals. It is one of the first components to check in a complete no-response diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BC116 | Factory-matched output for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BC116 transformer is wound and insulated to Carrier's exact VA and voltage tolerance specifications. Generic units frequently run under-rated VA capacity, causing premature burnout under normal HVAC control loads and potentially damaging downstream control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and confirm zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before disconnecting the old transformer.\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 as a direct OEM replacement for Carrier model \u003cstrong\u003eGB1AAV048135ABJA\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit's data plate or wiring diagram before ordering. Our team is available to confirm fitment prior to purchase — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909416341875,"sku":"CARRIE-GB1AAV048135ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909416374643,"sku":"CARRIE-GB1AAV048135ABJA-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_af1d2638-89d6-4b2d-ab98-5d30d0f67b08.jpg?v=1782941384","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048135abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}