{"product_id":"carrier-gb3aav036095afja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 24V Control Circuit for GB3AAV036095AFJA","description":"\u003ch1\u003eOEM Carrier 40VA Transformer 24V Control Circuit for Model GB3AAV036095AFJA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GB3AAV036095AFJA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage down to 24V to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and safety switches. When it fails, the thermostat goes blank, the furnace will not respond to any call for heat, and nothing in the control circuit activates. A failed transformer is often misdiagnosed as a bad control board, so always test the transformer output first with a multimeter before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V secondary output | Factory OEM part number HT01BC116 | Direct plug-in or wire-in mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and tested to Carrier's exact VA and voltage tolerances. Undersized or off-tolerance generic transformers can sag under load, causing intermittent lockouts, nuisance tripping of control boards, and premature component failure throughout the low-voltage circuit.\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, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output at secondary terminals after installation before restoring full power.\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 Designed for the Carrier \u003cstrong\u003eGB3AAV036095AFJA\u003c\/strong\u003e gas furnace. Verify your unit's existing transformer VA rating and primary\/secondary voltages on the data plate or wiring diagram before ordering. If you have any questions about fitment, our HVAC parts specialists verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909394780531,"sku":"CARRIE-GB3AAV036095AFJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909394813299,"sku":"CARRIE-GB3AAV036095AFJA-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_5ff76377-2db8-4be6-ae7b-30782078ba9a.jpg?v=1782899814","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb3aav036095afja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}