{"product_id":"carrier-gb1aav048110aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for GB1AAV048110AAJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB1AAV048110AAJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GB1AAV048110AAJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V control voltage that powers your thermostat, contactor coil, gas valve, and control board. When this part fails, the entire control circuit loses power — the result is a completely unresponsive system: no heat, no cooling, no thermostat communication, and no error codes displayed. If your unit is dead silent and your thermostat goes blank, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BC116 | Factory-matched construction for correct wire gauge and core saturation\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 circuit. Undersized or off-tolerance generic units can overheat, trip the built-in thermal fuse prematurely, or deliver unstable 24V output that causes nuisance lockouts and contactor chatter.\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, multimeter, wire nuts or quick-connect terminals. Verify 24V output with a multimeter after installation before closing the cabinet. Check for a shorted control wire causing the original failure before powering up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for \u003cstrong\u003eCarrier GB1AAV048110AAJA\u003c\/strong\u003e packaged units. Verify the 120V primary and 24V\/40VA secondary ratings on your existing transformer's label before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909419127155,"sku":"CARRIE-GB1AAV048110AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909419159923,"sku":"CARRIE-GB1AAV048110AAJA-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_2d7185ea-7cfb-4e90-9897-f4ce44cc1816.jpg?v=1782939815","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav048110aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}