{"product_id":"carrier-ha1bjx060000abaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HA1BJX060000ABAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model HA1BJX060000ABAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HA1BJX060000ABAA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, contactor coil, and zone controls. When it fails, the result is total system silence: the thermostat goes blank, nothing responds, and no call for heating or cooling is processed. A failed transformer is one of the most common causes of a completely unresponsive HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory-matched OEM replacement for part number HT01AW229 | Class 2 transformer for low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 is wound to exact Carrier factory specifications, ensuring correct VA capacity and voltage output under load. Undersized or off-tolerance generic transformers can overheat, trip internal thermal fuses, or deliver insufficient current to close contactors reliably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before disconnecting terminals. Check for a tripped secondary fuse or shorted control wiring before installing — a short on the 24V side will blow the new transformer immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier HA1BJX060000ABAA\u003c\/strong\u003e packaged unit using OEM part number HT01AW229. Always verify the VA rating and primary\/secondary voltage on your existing transformer's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909359391091,"sku":"CARRIE-HA1BJX060000ABAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909359423859,"sku":"CARRIE-HA1BJX060000ABAA-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_e84c35a7-9c9f-4a27-8d0b-46669d26a042.jpg?v=1782941524","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1bjx060000abaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}