{"product_id":"carrier-ph10pa04800gacaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V-24V for PH10PA04800GACAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model PH10PA04800GACAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH10PA04800GACAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, control board, contactor coil, and every low-voltage component in the system. When it fails, the entire control circuit goes dark — the thermostat shows no response, the system won't energize, and no fault codes appear because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01AW229 | Factory-matched output tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and tested to exact Carrier specifications, ensuring proper VA output under full control-circuit load. Generic units often underperform on VA capacity, causing nuisance lockouts, thermostat brownouts, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before handling. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. A simple, straightforward swap for any experienced tech or confident DIYer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered by 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PH10PA04800GACAA\u003c\/strong\u003e packaged heat pump. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or the old transformer's label before ordering. Our parts specialists are available to confirm fitment — reach out before you buy if you're unsure.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641979851123,"sku":"CARRIE-PH10PA04800GACAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641979883891,"sku":"CARRIE-PH10PA04800GACAA-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_6d6aca36-53cf-4c6e-bff2-d7f9a7c6f390.jpg?v=1775041280","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph10pa04800gacaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}