{"product_id":"carrier-gb3aav024070aeja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV024070AEJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model GB3AAV024070AEJA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV024070AEJA\u003c\/strong\u003e gas furnace. The transformer steps down line voltage from 120V to the 24V AC required to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and contactors. When this transformer fails, absolutely nothing in the control system responds: the thermostat goes dark, the furnace won't call for heat, and the system appears completely dead despite having power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BC116 | Direct drop-in replacement with matching mounting footprint and terminal configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic transformers can sag under load, causing nuisance lockouts, erratic thermostat behavior, and premature control board failure — making OEM the only reliable long-term choice.\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 spade terminals. Verify 120V primary and 24V secondary output with a multimeter after installation before reassembling the furnace cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eGB3AAV024070AEJA\u003c\/strong\u003e gas furnace. Confirm existing transformer's VA rating and primary\/secondary voltages on your unit's data plate before ordering to ensure a proper match. Have questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909402612083,"sku":"CARRIE-GB3AAV024070AEJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909402644851,"sku":"CARRIE-GB3AAV024070AEJA-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_d03bb632-832f-4343-ada6-3cf0ffe31810.jpg?v=1782941410","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav024070aeja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}