{"product_id":"carrier-gb3aav024070afja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB3AAV024070AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GB3AAV024070AFJA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB3AAV024070AFJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, nothing in the system responds: the thermostat goes blank, the furnace won't fire, and there is zero 24V signal at the board. If you've confirmed a blown fuse or tripped breaker but still have no control voltage after reset, a failed transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 control transformer | OEM part number HT01BC116 | Factory-matched output tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BC116 is wound to Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under load, trip the integrated fuse, or damage the control board — a far costlier repair down the road.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Label all wire connections before removal. Replacement typically takes 15–20 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship the 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\u003eGB3AAV024070AFJA\u003c\/strong\u003e gas furnace. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If you're unsure about fitment, our parts team is ready to confirm compatibility before you buy — no guesswork required. \u003cstrong\u003eOrder today and get same-day shipping.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909402448243,"sku":"CARRIE-GB3AAV024070AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909402481011,"sku":"CARRIE-GB3AAV024070AFJA-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_d785bc8c-b5af-436c-b019-fa51b256571c.jpg?v=1782941412","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav024070afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}