{"product_id":"carrier-hp13nr01800gakaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 24V for HP13NR01800GAKAA — HT01AW229","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model HP13NR01800GAKAA — Part HT01AW229\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier HP13NR01800GAKAA\u003c\/strong\u003e heat pump system. The transformer steps down 120V line voltage to the 24V signal voltage required to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing in the system responds: no thermostat display activity, no contactor engagement, and no blower or compressor operation. A failed transformer is often misdiagnosed as a control board failure, making proper diagnosis critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated output | 120V primary \/ 24V secondary | Factory-matched OEM construction | Replaces OEM part number HT01AW229\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact VA and voltage tolerances specified by Carrier engineering. Undersized or off-tolerance generic transformers can overheat, trip internal fuses, or cause erratic thermostat behavior — especially under peak demand when multiple control loads are active simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or push connectors. Test secondary output voltage (should read 24–28V AC) before assuming transformer failure. Photograph all wiring connections prior to disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eHP13NR01800GAKAA\u003c\/strong\u003e heat pump unit. Always verify your system's existing transformer VA rating and primary\/secondary voltage on the data plate or existing component label before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909321773427,"sku":"CARRIE-HP13NR01800GAKAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909321806195,"sku":"CARRIE-HP13NR01800GAKAA-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_fc680957-d08f-45f9-b681-797435eb104a.jpg?v=1782942618","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hp13nr01800gakaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}