{"product_id":"carrier-gb3aav048115afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GB3AAV048115AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC116 for Model GB3AAV048115AFJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier GB3AAV048115AFJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, absolutely nothing responds: the thermostat goes dark, no call for heat is acknowledged, and the system sits completely dead. A failed transformer is often misdiagnosed as a bad thermostat or control board, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part number HT01BC116 | Factory-matched output tolerance for stable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine OEM Carrier transformer. Generic alternatives may have lower VA ratings or looser voltage tolerances, which can cause nuisance tripping, control board brownouts, or premature contactor coil failure. OEM is always the safest choice for control circuit reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Label all 24V wiring before disconnecting. Secondary wiring typically includes R, C, and chassis ground leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eGB3AAV048115AFJA\u003c\/strong\u003e gas furnace. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's wiring diagram before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase. In stock and ready to ship today — get your system back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909390029171,"sku":"CARRIE-GB3AAV048115AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909390061939,"sku":"CARRIE-GB3AAV048115AFJA-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_b87a7469-6a11-4432-8a00-3d49ffaf21eb.jpg?v=1782938751","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav048115afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}