{"product_id":"carrier-gb1aav036111abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for GB1AAV036111ABJA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model GB1AAV036111ABJA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# HT01BC116) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier GB1AAV036111ABJA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, control board, and zone controls. When this component fails, absolutely nothing in the control system responds: the thermostat goes blank, the furnace won't fire, and no fault codes appear because the board itself has no power. A failed transformer is often overlooked during diagnosis but is a quick, low-cost fix when confirmed with a multimeter.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement | Part number HT01BC116 | Matches factory wiring terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact VA and voltage tolerances required by the Carrier control board. Under-rated or off-tolerance generic transformers can overheat under load, trip internal thermal cutoffs, and cause intermittent control failures that are notoriously difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph existing wiring connections before removal. Primary wires connect to line voltage leads; secondary wires connect to 24V control terminals on the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eGB1AAV036111ABJA\u003c\/strong\u003e gas furnace. Confirm your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to verify fitment — don't guess on a control circuit component. \u003cstrong\u003eOrder now and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909426237811,"sku":"CARRIE-GB1AAV036111ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909426270579,"sku":"CARRIE-GB1AAV036111ABJA-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_6cd8f32a-e479-41ce-89e5-ebeddea04706.jpg?v=1782939803","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav036111abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}