{"product_id":"carrier-gb1aav036111agja-transformer-h3hvc4","title":"OEM Carrier Transformer 40VA 120\/24V for GB1AAV036111AGJA — HT01CN001","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB1AAV036111AGJA — Part HT01CN001\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01CN001\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB1AAV036111AGJA\u003c\/strong\u003e gas furnace. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, and ignition board. When the transformer fails, the entire control circuit goes dark: your thermostat shows no power, the system is completely unresponsive, and no heating or fan operation occurs. A failed transformer is often caused by a shorted control wire, a stuck contactor coil, or age-related winding breakdown.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN001 | Direct plug-and-play fit for GB1AAV036111AGJA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers from Carrier are wound to exact VA and voltage tolerances, ensuring reliable 24V output under full load. Generic units frequently produce undervoltage at full circuit load, causing intermittent lockouts and nuisance tripping of the furnace 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, needle-nose pliers, multimeter. Photograph all low-voltage wiring before disconnecting. Always inspect all 24V wiring for shorts before installing the new transformer — a wiring short will destroy the new unit immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before 3PM ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eGB1AAV036111AGJA\u003c\/strong\u003e gas furnace. Verify OEM part number HT01CN001 on your existing transformer label or equipment data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before your order is placed — ensuring a correct first-time repair.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909425058163,"sku":"CARRIE-GB1AAV036111AGJA-TRANSFORMER-HT01CN001","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909425090931,"sku":"CARRIE-GB1AAV036111AGJA-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_dc4b02ba-ec58-44f6-9e24-84a2baa51ddb.jpg?v=1782938719","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav036111agja-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}