{"product_id":"carrier-hc1ajx048000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HC1AJX048000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model HC1AJX048000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HC1AJX048000AAAA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other component in the low-voltage control circuit. When this transformer fails, the entire system goes silent — no thermostat response, no contactor pull-in, no blower, no heat or cooling — making it one of the first components to diagnose during a complete no-operation call.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part number HT01AW229 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit uses factory-specified windings and built-in thermal overload protection. Generic transformers often lack proper overcurrent protection and can fail prematurely under shorted low-voltage circuit conditions, potentially damaging downstream controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Verify 24V output at secondary terminals before reconnecting control wiring. Photograph all existing wiring before removal.\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 stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier HC1AJX048000AAAA\u003c\/strong\u003e 4-ton packaged unit. Always confirm your unit's data plate voltage requirements match before installation. If you are unsure of fitment, our HVAC parts specialists verify compatibility before you order — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909341630835,"sku":"CARRIE-HC1AJX048000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909341663603,"sku":"CARRIE-HC1AJX048000AAAA-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_38dbc1e8-c8c2-4edd-98eb-8576bf1d8cda.jpg?v=1782941585","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hc1ajx048000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}