{"product_id":"carrier-gb1aav048111adja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GB1AAV048111ADJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model GB1AAV048111ADJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier GB1AAV048111ADJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer converts 120V line voltage down to the 24V signal voltage that powers your thermostat, control board, and all low-voltage control components. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, your system stops responding, and no heating or cooling function can operate. It is often the first component to check when absolutely nothing responds at the thermostat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched output tolerance for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA rating and insulation class. Generic transformers rated at nominal 40VA can under-perform under load, causing voltage sag that triggers nuisance lockouts and premature control board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Photograph existing wiring connections before removing the old transformer. Verify 24V output at secondary terminals before closing the cabinet.\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 climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eGB1AAV048111ADJA\u003c\/strong\u003e packaged unit. Always verify your unit's data plate voltage requirements and confirm OEM part number HT01BC116 before ordering. Our parts specialists are available to confirm fitment — just reach out before you buy. Order today and your part ships same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909417914739,"sku":"CARRIE-GB1AAV048111ADJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909417947507,"sku":"CARRIE-GB1AAV048111ADJA-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_9b7b7ae2-c50b-4341-9dd0-2eed85978aa3.jpg?v=1782938724","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048111adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}