{"product_id":"carrier-gb1aav060135agja-transformer-h3hvc4","title":"OEM Carrier 40VA Transformer 24V Control Circuit — GB1AAV060135AGJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN001 for Model GB1AAV060135AGJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN001\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB1AAV060135AGJA\u003c\/strong\u003e gas furnace. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, the system goes completely silent: no thermostat response, no call-for-heat activity, and no error codes because the board itself has lost power. A failed transformer is one of the most commonly misdiagnosed furnace faults, often mistaken for a bad control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 control circuit transformer | Direct OEM replacement for part number HT01CN001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN001 transformer is wound to Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under normal control circuit loads, tripping thermal protection or failing prematurely within one heating season.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Label all low-voltage wiring before removal. Most installs complete in under 30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eGB1AAV060135AGJA\u003c\/strong\u003e gas furnace. Always verify your existing transformer's VA rating and primary\/secondary voltages on the data plate before ordering to confirm fitment. Our HVAC parts specialists are available to confirm compatibility before you purchase — order with confidence and get your heat back on fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909410312563,"sku":"CARRIE-GB1AAV060135AGJA-TRANSFORMER-HT01CN001","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909410345331,"sku":"CARRIE-GB1AAV060135AGJA-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_792e2025-cdb7-45cc-a657-dac53bcbdf03.jpg?v=1782899840","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav060135agja-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}