{"product_id":"carrier-gb3aav036050aeja-transformer-h2usbz","title":"OEM Carrier Control Transformer 40VA 120\/24V for GB3AAV036050AEJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model GB3AAV036050AEJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier GB3AAV036050AEJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, gas valve, and all low-voltage control circuit components. When the transformer fails, the entire control circuit goes dark — the thermostat display may go blank, the system won't respond to any call for heat or cooling, and you may measure zero voltage at the 24V secondary terminals. A shorted transformer will often trip or blow the control fuse repeatedly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01BC116 | Factory-matched output for Carrier GB3AAV036050AEJA control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the exact factory-supplied transformer. OEM units are wound and potted to Carrier's specifications, ensuring stable 24V output under full load. Generic transformers frequently underperform at rated VA, causing nuisance lockouts and erratic board behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all wiring before removal. Replacement is straightforward — primary wires connect to line voltage, secondary wires feed the 24V control circuit.\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 and factory-matched for the Carrier \u003cstrong\u003eGB3AAV036050AEJA\u003c\/strong\u003e gas furnace. Verify your existing transformer's VA rating and primary\/secondary voltage on the data plate before ordering. If you are unsure of fitment, our HVAC parts specialists will confirm compatibility before your order ships — same-day shipping on all in-stock parts ordered before 3PM local time.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909400875379,"sku":"CARRIE-GB3AAV036050AEJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909400908147,"sku":"CARRIE-GB3AAV036050AEJA-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_fcd3b034-9a89-4f1a-bddc-249627a54789.jpg?v=1782911297","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036050aeja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}