{"product_id":"carrier-ph13nr02400gajaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V–24V for PH13NR02400GAJAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model PH13NR02400GAJAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH13NR02400GAJAA\u003c\/strong\u003e heat pump system. The control circuit transformer steps line voltage (120V) down to the 24V signal voltage that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — the thermostat shows no response, the system won't call for heating or cooling, and no relays or contactors will energize. Replacing it with the correct OEM unit restores safe, factory-spec operation immediately.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary → 24V secondary | 40 VA rating | OEM part number HT01AW229 | Factory-matched for Carrier PH13NR02400GAJAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class. Generic transformers may be undersized in VA, causing voltage sag that triggers nuisance lockouts and prematurely burns contactor coils.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire stripper, and wire nuts or spade connectors. Always photograph existing wiring before disconnecting the old transformer.\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 and tested specifically for the Carrier \u003cstrong\u003ePH13NR02400GAJAA\u003c\/strong\u003e heat pump. Verify your unit's control voltage and VA requirement on the data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641880727923,"sku":"CARRIE-PH13NR02400GAJAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641880760691,"sku":"CARRIE-PH13NR02400GAJAA-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_02139e19-0284-4a65-84cb-7aacc71a460b.jpg?v=1775041404","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nr02400gajaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}