{"product_id":"carrier-hb1bjx048000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HB1BJX048000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model HB1BJX048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier HB1BJX048000AAAA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal required to power the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and no fault codes are generated because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 transformer | Factory-matched OEM part number HT01AW229 | Direct plug-in or wire-in replacement\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 board. Undersized or off-tolerance generic units can cause nuisance tripping, blown fuses, or premature control board failure — making OEM the smart long-term investment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Confirm primary and secondary wiring colors before disconnecting the old unit and photograph all connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eHB1BJX048000AAAA\u003c\/strong\u003e packaged unit. Always verify the transformer VA rating and primary\/secondary voltages on your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — don't guess on control circuit components. \u003cstrong\u003eOrder now and your part ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909347758451,"sku":"CARRIE-HB1BJX048000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909347791219,"sku":"CARRIE-HB1BJX048000AAAA-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_45bde256-af91-4491-9fc5-3d48617a1559.jpg?v=1782941566","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1bjx048000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}