{"product_id":"carrier-gb3aav036050adja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GB3AAV036050ADJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC116 for Model GB3AAV036050ADJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB3AAV036050ADJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat display goes blank, the furnace will not respond to any call for heat, and no safety or operating functions can execute. A failed transformer is often the first suspect when absolutely nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary voltage: 120V AC | Secondary voltage: 24V AC | OEM part number HT01BC116 | Factory-matched output tolerance for stable low-voltage operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer, wound to exact factory VA and voltage specifications. Generic transformers may be under-rated in VA, causing brownouts on the 24V circuit under load — leading to erratic control board behavior and nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect switch and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching wiring). Photograph all wire connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 as a direct OEM replacement for the Carrier \u003cstrong\u003eGB3AAV036050ADJA\u003c\/strong\u003e gas furnace. Always verify the transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping available on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909401071987,"sku":"CARRIE-GB3AAV036050ADJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909401104755,"sku":"CARRIE-GB3AAV036050ADJA-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_49d07537-9ed3-4403-b60e-aa7ec3aa5422.jpg?v=1782938743","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036050adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}