{"product_id":"carrier-ph13nr04800gaeaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V→24V for PH13NR04800GAEAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model PH13NR04800GAEAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH13NR04800GAEAA\u003c\/strong\u003e heat pump system. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates the thermostat, contactor coil, and all safety controls. When it fails, the entire control system goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no contactors or relays energize. A failed transformer is often misdiagnosed as a thermostat or control board problem, making correct identification critical.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Compact chassis-mount design | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 transformer is wound and rated to exact Carrier factory specifications, ensuring correct VA capacity and thermal cutout settings. Generic transformers often carry undersized VA ratings that trip under normal load, causing nuisance lockouts and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire stripper. Always label or photograph existing wiring before disconnecting. The transformer mounts to the cabinet and connects to the control board low-voltage terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the Carrier \u003cstrong\u003ePH13NR04800GAEAA\u003c\/strong\u003e heat pump. Verify primary voltage (120V) on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641857069427,"sku":"CARRIE-PH13NR04800GAEAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641857102195,"sku":"CARRIE-PH13NR04800GAEAA-TRANSFORMER-HT01AW229-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_efb08e2e-2427-474d-8664-1e64ab194383.jpg?v=1775041466","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nr04800gaeaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}