{"product_id":"carrier-hp13nr03000gakaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HP13NR03000GAKAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model HP13NR03000GAKAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HP13NR03000GAKAA\u003c\/strong\u003e heat pump system. The transformer steps down line voltage (120V) to the 24V signal voltage required to power the control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control circuit goes dead — the thermostat shows no response, the system won't call for heating or cooling, and in some cases a blown fuse or tripped secondary may be the only visible symptom.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | OEM part number HT01AW229 | Direct drop-in replacement for factory-installed unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 transformer is wound and insulated to Carrier's exact specifications, ensuring stable 24V output under variable load. Generic transformers often under-deliver VA capacity, causing nuisance tripping, control board brownouts, and premature contactor failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before any work. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Verify secondary voltage (should read ~24–28V AC) after installation before restoring thermostat wiring.\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 Designed specifically for the Carrier \u003cstrong\u003eHP13NR03000GAKAA\u003c\/strong\u003e heat pump. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. If you're unsure of fitment, our parts specialists can confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909320790387,"sku":"CARRIE-HP13NR03000GAKAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909320823155,"sku":"CARRIE-HP13NR03000GAKAA-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_849901b6-b1bc-4f17-9ba5-734fc8c6bc94.jpg?v=1782941664","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hp13nr03000gakaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}