{"product_id":"carrier-gb3aav036070afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV036070AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB3AAV036070AFJA\u003c\/h1\u003e\u003cp\u003eThis is the factory-original OEM control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) designed as the exact replacement for the \u003cstrong\u003eCarrier GB3AAV036070AFJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates your thermostat, gas valve, inducer relay, and control board. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the furnace won't respond to any call for heat, and no LEDs illuminate on the control board. In many cases, a shorted downstream component causes the transformer to burn out; always check for low-voltage shorts before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 control transformer | OEM part number HT01BC116 | Factory-matched for full compatibility with GB3AAV036070AFJA control circuitry\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 the Carrier control board. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs, or deliver insufficient 24V current — causing intermittent lockouts or repeated burnout.\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, needle-nose pliers, multimeter (to confirm 24V output and rule out downstream shorts). Label all wire connections before removal. Typical replacement time: 20–30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eGB3AAV036070AFJA\u003c\/strong\u003e gas furnace. Verify existing transformer VA rating and primary\/secondary voltages on your unit's data plate or wiring diagram before ordering. If your transformer failed due to a blown fuse or tripped breaker, inspect the 24V circuit for shorts prior to installation. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909397827955,"sku":"CARRIE-GB3AAV036070AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909397860723,"sku":"CARRIE-GB3AAV036070AFJA-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_c1c8caa5-8359-412f-a293-7a9bec72dec6.jpg?v=1782941425","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036070afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}