{"product_id":"carrier-ha1ajx048000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HA1AJX048000AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model HA1AJX048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified control transformer for the \u003cstrong\u003eCarrier HA1AJX048000AAAA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, contactor coil, gas valve, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, nothing responds, and the system will not heat or cool regardless of demand. A failed transformer is often the first diagnosis when absolutely nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01AW229 | Factory-matched for Carrier HA1AJX048000AAAA packaged unit control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine OEM Carrier transformer, engineered to exact VA and voltage tolerances. Generic transformers may be undersized in VA output, causing nuisance tripping, control board brownouts, or premature failure under full load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify primary and secondary voltages with a multimeter before and after installation. Always confirm fuse or circuit protection on the 24V secondary side.\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 specifically for the Carrier \u003cstrong\u003eHA1AJX048000AAAA\u003c\/strong\u003e 4-ton packaged unit. Confirm your unit's control transformer VA rating and input voltage on the unit data plate before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909369090419,"sku":"CARRIE-HA1AJX048000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909369123187,"sku":"CARRIE-HA1AJX048000AAAA-TRANSFORMER-HT01AW229-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-HT01AW229_ebaf0cbf-5950-484f-8df8-0e36d662f170.jpg?v=1782941490","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1ajx048000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}