{"product_id":"carrier-ga1aad036050abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GA1AAD036050ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC116 for Model GA1AAD036050ABJA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GA1AAD036050ABJA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and every low-voltage safety circuit in the system. When the transformer fails, nothing responds — the thermostat goes dark, the contactor won't pull in, and the unit sits completely dead even though line power is present. A blown transformer is also a common symptom of a downstream short in the 24V circuit, so always check secondary-side current draw before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40 VA rating | Primary: 120V | Secondary: 24V | Factory-matched to OEM control board requirements | Replaces OEM part number HT01BC116\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the exact factory unit — correct VA rating, terminal footprint, and mounting configuration. Undersized generic transformers overheat and fail prematurely, and an incorrect VA rating can starve multi-stage controls of the current they need to operate reliably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before proceeding. Tools needed: multimeter (verify 24V output and check for secondary shorts first), 1\/4\" nut driver, small flat-head screwdriver for terminal screws. Photograph all low-voltage wiring before disconnecting. Confirm secondary circuit is clear of shorts before powering up the replacement.\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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003eGA1AAD036050ABJA\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing part label before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909453762931,"sku":"CARRIE-GA1AAD036050ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909453795699,"sku":"CARRIE-GA1AAD036050ABJA-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_6f7b92d0-602c-4ea4-ab6e-9ffe51bc35dc.jpg?v=1782941308","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad036050abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}