{"product_id":"carrier-hp13nr04800gakaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120\/24V for HP13NR04800GAKAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model HP13NR04800GAKAA\u003c\/h1\u003e\u003cp\u003eThis is the factory-original OEM replacement transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HP13NR04800GAKAA\u003c\/strong\u003e heat pump system. The control transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, contactor coil, and all low-voltage control circuitry. When it fails, the entire control circuit goes dark — your thermostat goes blank, the system stops responding to calls for heating or cooling, and no components receive a start signal. A failed transformer is often misdiagnosed as a thermostat or control board issue, making it a critical first diagnostic check.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 transformer | OEM part number HT01AW229 | Factory-matched to Carrier HP13NR04800GAKAA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for your system. Undersized or off-spec aftermarket units can overheat under full load, trip internal fuses prematurely, or deliver unstable 24V that confuses control boards and thermostats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and disconnect panel before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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\u003eHP13NR04800GAKAA\u003c\/strong\u003e split-system heat pump. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing component label before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order today and receive same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909320233331,"sku":"CARRIE-HP13NR04800GAKAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909320266099,"sku":"CARRIE-HP13NR04800GAKAA-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_6f94e11c-5234-44d5-bd8c-2a62ed6048e4.jpg?v=1782938766","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hp13nr04800gakaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}