{"product_id":"carrier-cgh12520d-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for CGH12520D — HT01BC116","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model CGH12520D — Part HT01BC116\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer for the \u003cstrong\u003eCarrier CGH12520D\u003c\/strong\u003e unit, sold under part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system will not heat or cool, and no error codes will display because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | Capacity: 40VA | OEM Part Number: HT01BC116 | Factory-matched to Carrier CGH12520D specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and insulated to Carrier's exact VA rating and thermal limits. Generic substitutes frequently run under-rated VA, causing premature burnout under normal heating and cooling demand cycles — especially in systems with multiple low-voltage accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to confirm 24V output after installation. Label all wiring before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and tested for the \u003cstrong\u003eCarrier CGH12520D\u003c\/strong\u003e. Always verify your unit's data plate voltage requirements before ordering. If your system uses 208\/240V primary input, do not order this unit — confirm input voltage with a multimeter at the transformer primary leads. Our fitment team is available to verify compatibility before you purchase. \u003cstrong\u003eOrder today and get same-day shipping — back in comfort fast.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909642604915,"sku":"CARRIE-CGH12520D-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909642637683,"sku":"CARRIE-CGH12520D-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_a4001993-faba-4415-9e2b-d8d021433b56.jpg?v=1782940734","url":"https:\/\/nationalhvacparts.com\/products\/carrier-cgh12520d-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}