{"product_id":"carrier-gb3aav036070aeja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/240V-24V for GB3AAV036070AEJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model GB3AAV036070AEJA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV036070AEJA\u003c\/strong\u003e gas furnace. The transformer steps down line voltage (120V or 240V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heat or cooling, and the furnace will not ignite. It is one of the most commonly overlooked failure points in a no-power diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120\/240V | Secondary: 24V AC | Direct OEM replacement for Carrier part HT01BC116 | Factory wire leads for plug-and-play installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-tolerance generic units can cause nuisance tripping of the 3-amp control fuse, erratic thermostat behavior, or premature board failure — costing far more than the savings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Confirm primary voltage on your unit's data plate before connecting. Photograph all wiring before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eGB3AAV036070AEJA\u003c\/strong\u003e gas furnace. Always verify your existing transformer's VA rating and primary voltage on the data plate before ordering to ensure correct fitment. Our parts specialists are available to confirm compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909398090099,"sku":"CARRIE-GB3AAV036070AEJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909398122867,"sku":"CARRIE-GB3AAV036070AEJA-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_c269bf9a-1be6-4edd-82e5-d5886853cc89.jpg?v=1782938585","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036070aeja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}